Hello friends! The fact that Windows 7 likes to scare with all sorts of blue screens and other errors, I think everyone knows. But not everyone knows how to deal with these problems. Today I will write what to do if windows 7 won't boot and how to try to return the system to working capacity.
You understand that there are a lot of problems that lead to various errors, as well as the errors themselves. And of course, there are also many ways to fix all these “glitches”! I will write about one method that should be applied first if Windows 7 has stopped loading.
If you turn on the computer, and then an error like “ “, or “ ” appears in front of you (I wrote these two errors as an example, you may have a different problem), then you should first of all try the method that I will write about now, well and if it doesn’t help, then look for a solution to the problem by the error number, or other signs of it.
And if all this already seemed complicated to you, then it’s better to contact the guys who repair laptops in St. Petersburg, I think it will be easier this way. Well, if your eyes are already on fire, and you want to fix the computer yourself, then read on :).
Windows 7 won't boot? We solve the problem.
All we need is a Windows 7 installation disc. Someone will say, yes, just something. But even if you don't have one, it's not that hard to create one. Just download the .iso image from the internet, and .
So, we insert the Windows 7 installation disk into the computer drive and reboot it. If you see an inscription, such as the one below in the picture, then press any button and wait until a window appears with a choice of language.
Well, if you didn’t see such an entry, but an error appeared, that is, the computer tried to boot as usual, then, and set it. After that, restart the computer again.
We see a window with a choice of language. Select Russian and click "Next".
In the next window select "System Restore".
After searching installed systems on the computer, select your system in the list (most likely it is there alone), and click "Next".
Now we have the opportunity to choose one of the ways to restore Windows work 7. If you have it enabled "System Restore" then you can try this method. If, for example, you have a disk with a recovery image, you can try to fix your computer with it by selecting “System Image Recovery”. You can also run “command line” , which by the way can be useful in other ways to solve system errors.
But I advise you to start “Startup Restoration”. After you select this item, the utility will scan your computer, and if it finds a problem through which Windows 7 did not boot, it will try to fix it.
If this method did not help and Windows 7 still does not load, then you need to look for a solution to the problem, for example, according to the words from the error, or the code. You can also use the search on this blog, perhaps I have already written about such a problem. I hope I was able to help you. Good luck friends!
The problem of Windows boot failure is quite common, despite the fact that Windows 7 and Windows 10 are very reliable operating systems and rarely crash. Of course, equipment plays a huge role in this, which is very diverse for home systems, and for budget solutions it has a low fault tolerance factor.
In most cases, errors in loading the OS are either the users themselves, who, for example, performed an incorrect shutdown of the PC or accidentally deleted a system file, or HDD, which has a bad area on the boot sector.
CHIP invites you to use our tips to solve the problem with Windows boot and restore system performance.
Let's try to start
Facing an inability to download operating system Windows, for starters, it’s worth restarting the computer a couple of times, because the problem can be one-time. If it does not help, then try to de-energize the computer for ten seconds by unplugging it from the mains. In this case, you need to de-energize the uninterruptible power supply, if one is connected, and if we are talking about a laptop, then remove the battery.
It also does not hurt to temporarily disconnect external equipment: mouse, keyboard, printer, removable drives, modules wireless communication And so on. If the reason lies in external devices, alternately connecting each of them will help to calculate the culprit.
Of course, not always the problem can be solved by simple manipulations, which means that you will have to start analyzing the text of the error message that appeared during computer startup.
The bootloader might be corrupted
If you see a message on the screen with the text "BOOTMGR is missing", then the operating system loader Windows systems 7 is damaged or missing. To solve the problem, you need a Windows 7 installation disc.
Restart your PC and in the first seconds of loading press function key to open BIOS. For different PCs, this may be different keys, such as ESC, F2, or F6. Pressing the F8 key in Windows 10 will bring up a menu of special boot options, including safe mode. If that didn't work when reloading dozens, hold down the Shift key.
So, if you managed to get into the BIOS, go to the “Boot device priority” section using the “+” or “PgUp” key, assign it first boot device CD/DVD drive. Then boot from the Windows installation disc and select the "System Restore" menu item. From the list of installed operating systems (if there are several), select the one you need and click the "Next" button.
In the "System Recovery Options" window that appears, we are interested in two items: "System Startup Repair" and "Command Prompt". The first option will automatically fix the problem with starting the operating system, and if it fails, you will have to turn to the services of the second.
At the command line, type:
"bootrec /rebuildbcd"
press "Enter" and agree to make changes to the boot configuration data by alternately pressing the "Y" and "Enter" keys. After that, it remains only to create a new boot sector using the "Bootrec /FixBoot" command and restart the computer.
Boot disk not found?
The error message “No bootable device” and its many variations (“No Boot device found”, “Invalid boot device”, “Non system disk or disk error”, etc.) indicates that the computer has not even started to start operating system, because it does not see the boot sector or even the hard drive.
To understand whether the problem lies at the software or hardware level, just go into the BIOS in the already familiar section “Boot device priority”. If the hard drive (HDD) is not visible among the proposed options, then the problem is related to the equipment. The power or power data cable may have come loose hard drive, or the drive has completely outlived its own.
If the computer normally recognizes the hard drive, the reason is software in nature and lies in the master boot record (MBR) - it is damaged or missing. Unlike those discussed above, this situation is relevant simultaneously for Windows 7 and XP, but it is solved extremely simply.
After booting from the installation disk, it is enough to execute just one command in the recovery console:
bootrec /fixmbr
Blue Screen of Death: Driver IRQL not less or equal
Critical messages Windows errors, which are called "blue screens of death" (BSOD) because of the background color. blue screen of Death), quite common problems not only in Windows 7 but also in Windows 10 (especially due to installing the wrong update). And in the top ten, this screen can be green and red. The reason for the appearance critical error there may be malfunctioning hardware, such as RAM or the absence of some system files.
Most often, early boot BSOD messages appear after updating device drivers and contain the text "DRIVER_IRQL_NOT_LESS_OR_EQUAL" along with the file name with a SYS extension. To remove the problematic driver in Device Manager, you can try starting Windows in safe mode, because it uses only a minimal set of drivers. To do this, press the F8 key during OS boot and select the "Safe Mode" item.
If the blue screen of death still appears when booting in safe mode, you need to revert to the previous version of the driver, with which there were no problems. You can do this using a restore point, if any were created earlier.
In Windows 7, for this you need to press the F8 key during the OS boot and select the "Troubleshoot your computer" item in the menu that appears. After that, we get into exactly the same menu of "Recovery Options" as when using the Windows installation disk.
This time we are interested in the "System Restore" item, in which you can select one of the available restore points.
Returning a copy of the system file
The absence of some important system files in the system, primarily drivers with the SYS extension, is often found in Windows 7 and 10. effective method solve the problem - return the loss to its place, finding its copy on installation disk Windows, borrowed from another computer with the same version of the OS, or simply found on the vast expanses of the Internet.
If there is no second computer at hand, then to search, download and copy files, you will need a LiveCD with an OS that does not require installation, for example, Kaspersky Rescue Disk 18.
One of the most convenient options is the Puppy Linux operating system, which will be ready to go in less than a minute. This OS includes drivers for the most common models network cards, which means that accessing the Internet is not difficult.
The exceptions are the system registry files: System, Software, SAM, Security and Default, which are stored in the C:\windows\system32\config folder. Of course, replacing them with copies from another computer will not work, so the only option is to roll back to the restore point if it was done at the time.
Reboot Windows 10
And in order for the Windows 10 recovery tool, you need to open the menu additional ways download (by pressing F8 after turning on the computer) and go to the "Troubleshooting" section.
The chance to have time to press the desired key at this time (more precisely, the combination of F8 and Shift) is great if the system is installed on an MBR hard disk and the option is disabled quick launch. For fast system drives The SSD will have to try to push fast or you will need bootable media.
In any case, you will need a Windows 10 installation disc. In our experience, the Windows 10 emergency recovery disc often cannot help restore the system. It is worth considering that the system image must be of the same bit depth as that installed on your PC. In addition, if you are using a bootable drive, it must be with file system FAT32.
Alternatively, you can use the MS DaRT 10 (Microsoft Diagnostic and Recovery Toolset for Windows 10) download package. You can download it from the official Microsoft website. Windows 10 images are available for download from the Microsoft website.
Using bootable Windows 10 media
Connect the media to the computer, reboot, set in BIOS settings and first this disk and boot from it. After booting from it, select the system language. If Russian is selected, click Next.
Next, you will be prompted to proceed to install or restore Windows. Click System Restore. On the Select Action screen, click Troubleshooting.
tens launch recovery options
The recovery options section (Advanced Options screen) contains 5 subsections:
- System Restore. When this option is selected, the standard rstrui.exe utility is launched, the purpose of which is to roll back the system to one of the saved checkpoints.
- Restoring a system image. Launches the Windows Deployment Wizard from backup, created by the OS's own tools.
- Boot recovery. Fixes bugs boot files and sections.
Command line. Allows you to run various system utilities. - Revert to a previous build. Performs a rollback to a previous installed version OS if it has been upgraded to Windows 10.
Repair Utilities
Almost all of the Windows boot problems discussed in this article can be caused by corrupted hard disk (bad blocks). Even if, with the help of one of the manipulations discussed in the article, the operating system was brought back to life, it does not fit to check the working condition of the hard drive.
This can be done using the free MHDD application (can be downloaded), which can be launched directly from the bootable CD. In the program menu, you must select from the list the channel to which the hard drive with the OS is connected, indicating its number. Then you can view the S.M.A.R.T data, a kind of “medical record” of the hard drive (F8 key), or start scanning sectors for errors (F4 key), having previously allowed their correction - “Remap | ON".
If there are a lot of problem sectors, then the procedure can take hours or even days. Considering that bad blocks tend to be concentrated at the beginning of the hard drive, it will be easier to move the OS partition away from the problem area - a 2 GB offset will be enough.
Suitable for this purpose boot disk With free editor sections MiniTool Partition Wizard FE . In the program menu, you need to resort to the operation “Partition | Move/Resize".
As we noted above, the cause of BSOD may be RAM, which is not capable, for example, of operating at higher frequencies. In such cases, on blue screen the following text is possible: "PAGE_FAULT_IN_NONPAGED_AREA".
You can test the RAM modules free app memtest86. Like MHDD, Memtest86 can be run from a bootable CD. The application does not require configuration and immediately after launch it starts diagnosing using a number of tests. The menu item "Pass" displays the number of completed test cycles, while "Errors" - the number of errors recorded.
Each user has encountered a situation where Windows 7 does not start. A black or blue screen, a long boot, or just a black screen - there are many options, as well as reasons. In this article, we will analyze possible ways solution of the problem.
Causes
The problem of why Windows 7 does not start arises for several main reasons:
- Influence third party applications;
- Damage to the integrity of the registry and system files;
- Incompatibility of drivers and hardware;
- And finally, the problematic update.
Depending on how the error manifests itself, there are effective ways her decisions. We will describe the solution to the situation, depending on the situation that led to the error.
#1 After installation/reinstallation
Consider the situation when the system does not start after installing Windows 7. You installed or reinstalled Windows 7 and a black screen or recovery tool occurs after a reboot.
Cause 1: The system was installed, but the boot priority has not changed.
During system installation, the computer initially accesses the installation media (USB or DVD). And after copying the files and the first reboot, to continue the installation, it accesses the hard disk.
There are times when the priority does not automatically change and the computer gets stuck in an intermediate stage. To do this, in the boot priority settings, you must select the hard disk or drive where the installation was carried out.
Reason 2: Problem during installation
- Also, common problem are errors during system installation - choosing an incorrect partition, a “broken” installation drive or image.
- If you encounter problems during the installation process that causes Windows 7 to stop starting after reinstallation, try using a new image or drive, and also try installing to a different partition.
Reason 3: Hardware problem
- A rare situation when neither re-installation, nor another drive, etc. helps. In this case, you need to check the equipment.
- First of all, the hard drive RAM- for this you can use various utilities available on the Internet. For HDD/SSD - DLGDIAG, Samsung HUTIL or Victoria (obsolete). For RAM, you can use MemTest.
An error may be responsible for the error motherboard, processor and other components, so it is better to have your computer diagnosed by specialists.
#2 After the update
Another common problem is when, after installing fresh updates on Windows 7, the system no longer starts. It is most likely that it lies in the update itself, and to be more precise, in the compatibility of the device and the integrity of the system.
Unlike Windows 10, the 7 version of the system was much more stable when it came to updates, but problems were still not uncommon. To resolve this situation, do the following:
- When turning on the computer, press the F8 key to bring up the menu additional options;
- On this page, select the Last Known Good Configuration option. But if this option does not help, select "Safe Mode";
- If the system boots, go to the control panel and open the Center windows updates;
- In the log, check which updates were last installed;
- After that, go to " installed updates and uninstall the latest updates.
After that, you will need to restart the computer and your problem, when the system on the computer does not start after updating Windows 7, will be solved. If not, go to restore.
#3 Black screen
The situation when Windows 7 does not start and a black screen occurs often interferes with users of the operating system. The main reason is the conflict between system files and third-party software (most often antivirus).
- First of all, check the availability of the task manager by pressing the following keyboard shortcuts:
- If the dispatcher starts successfully, click on File and try creating a new task - msconfig.
- Then, in the "Services" tab, disable all non-system services with the appropriate checkmark.
- After that, in the "Startup" tab, disable all applications. Restart your computer;
- If the task manager does not start in Windows 7, then what should I do?
- Try the same steps in safe mode. The main goal is to determine the cause of the black screen and disable the application that leads to the error.
It is worth remembering that often the problem can be an antivirus - an outdated or not updated version. In this case, disabling autoload will not help. You must disable or remove it through safe mode.
#4 Infinite download\restore
Next in line is another unpleasant situation when the system is cyclically booted or trying to recover. A very annoying error - can be solved by simply waiting (there was a case when the system rebooted for 8 hours and successfully booted), and complete reinstallation.
Let's analyze this case when it does not start Windows computer 7 and what to do about this problem. To get started, go to the advanced options menu (F8 key on reboot) and select "Troubleshoot your computer".
Then, on the recovery page, try executing Windows recovery:
- The first option when Windows 7 does not start is to restore startup on the computer. He decides simple problems with system boot (occasionally, but helps).
- System Restore - "rollback" to a pre-created point. The most priority option, since with a high degree of probability it can solve the problem.
- Image recovery - if you have previously created an image of your system, the ideal option is to use it. If you didn’t create it, then this option is useless for you.
Compared to Windows 10, where system protection is turned off by default, Windows 7 looks to be in a more advantageous position, since protection is enabled there and successfully creates restore points, so the chances of further successful work are much higher.
But there are also cases when Windows 7 does not start and is not restored on a laptop or PC. In this case, you will have to resort to using the installation media to perform a reset or reinstall.
#5 Blue screen
- If instead of the desktop or the user selection screen, you see a blue screen and a lot of lines of incomprehensible information, you have encountered an error called the Blue Screen Of Death (BSOD). Critical failure caused by an error or conflict in system services.
- To analyze the error and identify the root cause, the blue screen shows the error codes and the failed module (not always).
- You can search by bug code on the developer page - https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/bug-check-code-reference2.
- Get detailed information on the failed module on the page - https://www.carrona.org/dvrref.php. This is a database compiled by network users to help solve problems with their PC.
If the problem rarely appears and you manage to log in, this greatly facilitates further actions. We will need to get more information about the error that occurs and this can be done using a memory dump.
- To enable automatic error dump saving, open the computer properties and the Advanced tab.
- Then go to the "Download and Recovery" options.
- Set saving a mini dump when an error occurs. Specify the folder where the information will be saved.
After the problem occurs, you can analyze the dump using the following tools:
- BlueScreenView is a fairly simple application with a simple and clear interface;
- Windbg (or Debugging Tools for Windows) - Microsoft tools for analyzing BSOD, it will be quite difficult for ordinary users to understand this application;
- osronline.com is a service where you can check a memory dump online for errors.
So if the problem Windows startup 7 is that the system does not start and a BSOD occurs, then the solution should begin with an analysis of the problem. We also wrote about what problems you may encounter and how to easily analyze the cause of the error.
Have a great day!
Reason #1
The first thing you should pay attention to is whether your computer is suitable for the . To install windows 7, you must have the following characteristics:
RAM over: 1Gb- 2Gb recommended
Free hard disk space:
16Gb- 32-bit version
20Gb- 64-bit version
Video card with support: DirectX 9
Processor frequency over: 1GHz
In Bios, set the priorities from which windows 7 will be installed, if from a CD-ROM, then put the first one in the boot with cider, if from a USB flash drive, then naturally put USB. Disable the Floppy disk if you have one, no one uses it anyway.
Reason #2
The second thing you should pay attention to is those users who have system blocks. Open the lid system block and check the connection of all plugs, especially those suitable for the hard drive. Check the RAM sticks, pull them out and put them back in, of course, if possible, check the hard drive and RAM for errors using utilities, see if the cooler works fine to blow the video card and processor. If the installation is in progress and at some stage, as it seems to you, that a freeze has occurred, then do not rush to turn off the computer, wait 10-15 minutes, after this time the installation will continue.
Reason #3
Thirdly, windows 7 may not be installed due to the windows 7 distribution itself, that is, the disk that you purchased in the store, be sure to come back to the store and let the disk be checked in front of you. If you downloaded windows 7 from some source, then it is advisable to check the checksums or download windows image 7 from another source. Read this article, it describes an example, from the office. Microsoft site.
Reason #4
Fourthly, if you still downloaded windows distribution 7 and burned it to DVD, read here or created bootable flash drive how to do this, read in this article and windows 7 is still not installed, then you need to pay attention to the DVD disc itself, it may have scratches on it or the disc itself is just a bug. Burn the image to another disk and preferably new do the same with the flash drive.
Let me give you an example about DVD discs. Recently, one person wrote to me by mail that windows 7 was not being installed. Of course, I practically knew something and advised him to do it. It came to replacing the DVD disc, but he said that he had already changed this disc, either the second or third time, I want to note that the DVD disc was of the same manufacturer and there was no result, the system did not want to be installed, so and not installed. A day or two later, I don’t remember exactly, he writes to me again. All windows 7 installed, the reason was DVD discs, these disks of the same manufacturer (that is, the same ones) were purchased by a person in a store in which his friend worked and his friend then told him that the entire batch of disks was simply defective, that's how things are. Make a conclusion.
Reason #5
We go further, the reason that the system is not installed may be due to the program itself, it may have written crookedly, try rewriting, if it does not help, then try recording the image through other programs. There are many programs, for example, I use programs Nero, UltraISO, BurnAware Professional choose for yourself, as they say, there are no comrades for taste and color.
Reason #6
Many users additionally enjoy connecting to a TV through an output HDMI. What I want to say when you start to install the system and at some stage windows 7 won't install, that is, it freezes and a black screen appears, then know that the system continues the installation, just during the installation process, the system detects two monitors and displays all the information to continue the installation on the TV screen. Just unplug the cord from the outlet HDMI and continue with the installation process. By the way, I have already written about this more than once in the comments to articles about windows installation 7 and Black windows screen 7.
Reason #7
And the last thing we will look at is probably the most common problem, because there were a lot of questions on this topic when windows 7 won't install and asks for a driver for the hard drive. In general, on this occasion, you need to write a separate article here, so I’ll say briefly, go into the BIOS and look through all the tabs, switch the SATA controller mode from AHCI to IDE or vice versa.
Write in the comments how you fixed this problem I think everyone will be interested. Good luck to all! See you on the pages of the site.
Sometimes PC users encounter such an unpleasant situation as the inability to run programs. Of course, this is a very significant problem that prevents most operations from being performed normally. Let's see how you can deal with it on computers running Windows 7.
When talking about inability to run programs on Windows 7, we are primarily referring to problems related to EXE files. The reasons for the failure can be different. According to this, there are various ways troubleshooting these types of problems. Specific mechanisms for solving the problem will be discussed below.
Method 1: Restoring the EXE file association through the "Registry Editor"
One of the most common reasons why applications stop running with EXE extension, is a violation of the file association due to some kind of failure or the actions of viruses. After that, the operating system simply ceases to understand what needs to be done with this object. In this case, it is necessary to restore the broken associations. The specified operation is performed through the system registry, and therefore, before starting manipulations, it is recommended to create a restore point, in order to be able to cancel if necessary changes made V "Registry Editor".
- To solve the problem, you need to activate "Registry Editor". This can be done using the utility "Run". Call it with a combination Win+R. In the field enter:
Click OK.
- is running "Registry Editor". In the left part of the window that opens, registry keys are presented in the form of directories. Click on name "HKEY_CLASSES_ROOT".
- A large list of folders opens, arranged in alphabetical order, whose names correspond to file extensions. Look for a directory that has the name ".exe". Having selected it, go to the right side of the window. There is a setting called "(Default)". Click on it right click mice ( PKM) and select position "Change…".
- "Meaning" deposit "exefile" if it is empty or any other data is there. Now press OK.
- Then return to the left side of the window and look in the same registry key for a folder called "exefile". It is located below directories that have extension names. Having selected the specified directory, again move to the right side. Click PKM by parameter name "(Default)". Select from the list "Change…".
- The parameter editing window appears. In field "Meaning" write the following expression:
Click OK.
- Now, moving to the left side of the window, return to the list of registry keys. Click on folder name "exefile", which had previously been selected. Subdirectories will open. choose shell. Then select the subdirectory that appears open. On the right side of the window, click PKM by element "(Default)". Select from the list of actions "Change…".
- In the parameter change window that opens, change the value to the following option:
Click OK.
- close the window "Registry Editor", then restart your computer. After turning on the PC, applications with the EXE extension should open if the problem lay precisely in the violation of file associations.
Method 2: "Command line"
The problem with file associations, due to which applications do not start, can also be solved by entering commands in "Command line" running with administrative rights.
- But first we need to create a registry file in Notepad. Click for it "Start". Next choose "All programs".
- Go to catalog "Standard".
- Here you need to find the name "Notebook" and click on it PKM. Select from the menu . This is an important point, because otherwise it will not be possible to save the created object in the root directory of the disk C.
- Runs standard text editor Windows. Enter the following entry into it:
Windows Registry Editor Version 5.00
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.exe]
"exefile"=hex(0): - Then navigate through the menu item "File" and choose "Save as…".
- The save object window appears. We pass in it to the root directory of the disk C. In field "File type" change option « Text Documents» per item "All files". In field "Encoding" choose from the drop down list "Unicode". In field "File name" write any name convenient for you. After it, you need to put a period and write the name of the extension "reg". That is, in the end, you should get an option according to the following template: "File_name.reg". After you have completed all the steps above, click "Save".
- Now it's time to run "Command line". Back through the menu "Start" and paragraph "All programs" move to directory "Standard". Looking for a name "Command line". When you find this name, click on it PKM. Select from the list "Run as administrator".
- Interface "Command line" will be opened with administrative privileges. Enter the command following the pattern:
REG IMPORT C:\filename.reg
Instead of a part "file_name.reg" you need to enter the name of the object that we previously created in Notepad and saved to disk C. Then press Enter.
- An operation is being performed successful completion which will be immediately reported in the current window. After that you can close "Command line" and restart PC. After restarting the computer, the normal opening of programs should resume.
- If, nevertheless, EXE files still do not open, then activate "Registry Editor". How to do this was described in the description of the previous method. In the left part of the window that opens, go sequentially through the sections "HKEY_Current_User" And Software.
- A rather large list of folders opens, which are placed in alphabetical order. Find a catalog among them Classes and go into it.
- A long list of directories opens, which have the names of various extensions. Find a folder among them ".exe". Click on it PKM and choose an option "Delete".
- A window opens in which you need to confirm your actions to delete the partition. Click "Yes".
- Further in the same registry key Classes look for the folder "sec file". If found, click on it in the same way PKM and choose an option "Delete" followed by confirmation of their actions in the dialog box.
- Then close "Registry Editor" and restart your computer. When you restart it, the opening of objects with the EXE extension should be restored.
Method 3: Disable File Lock
Some programs may not run in Windows 7 simply because they are blocked. This only applies to startup. individual objects, not all EXE files generally. To solve this problem, there is its own overcoming algorithm.
Method 4: Eliminate viruses
One of the most common reasons for failure to open EXE files is a computer virus infection. By disabling the ability to run programs, viruses thereby try to protect themselves from anti-virus utilities. But the question arises before the user, how to run an antivirus to scan and treat a PC if program activation is not possible?
In this case, you need to scan the computer with an antivirus utility with using LiveCD or by connecting to it from another PC. To eliminate the action of malicious programs, there are many types of specialized software, one of which is Dr.Web CureIt . During the scanning process, when a threat is detected by the utility, you need to follow the tips that are displayed in its window.
As you can see, there are several reasons why all programs with the EXE extension or only some of them do not start on a computer with Windows 7. The main ones are the following: operating system malfunctions, virus infection, blocking individual files. For each reason, there is an algorithm for solving the problem under study.
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