Check the Windows 7 system. Run SFC using the recovery environment

Useful tips

Applications that do not work or have errors from Windows Store, problems in the operation of the desktop part of Windows and instability of the operating system as a whole are often the result of damage to important system files. The easiest way out of a situation where system files are damaged - or to . But such a move requires the presence of the latter - if not in a fresh edition, then at least in some kind. If there is not even at least some kind of recovery point or backup copy, before resorting to a radical solution to the problem in as Windows, you can try to restore the integrity of its system files. Below we will look at 5 ways to do this, provided that the current Windows yet capable of loading. Only two methods for restoring the integrity of Windows files will be offered; the other three are solutions for situations complicated by the need to restore the storage of system components.

1. Restore the integrity of Windows files

To identify missing or damaged important files systems and their Windows recovery provides standard utility sfc.exe, which works using the command line. The utility replaces damaged or missing system files with their originals from a special component storage located in the “WinSxS” folder inside the “Windows” directory on drive C. Run the command line as administrator and enter:

Press Enter. After scanning to identify system files that need to be replaced, they will be restored.

But this is only after successful completion of the operation. If the contents of the storage itself are damaged, the operation will end with a message stating that it is impossible to restore some of the system files. In this case, you must first resort to restoring the storage Windows components, and then carry out the operation to restore files to their working directories.

2. Restoring the system component store: DISM

To restore the storage of the original system files, we will use the maintenance utility Windows images– DISM, also working via the command line. During the storage recovery process, the utility uses the Windows Update service and downloads missing or damaged system files from Microsoft servers. Because the presence of the Internet - required condition for a successful operation.

Launch the command line as administrator and enter:

DISM /Online /Cleanup-Image /RestoreHealth

Press Enter. If the operation is successfully attempted, we will see a corresponding notification.

Now we carry out the operation discussed in paragraph 1 of the article.

It may also happen that the operation process will freeze or fail. A notification about an unsuccessful attempt to perform an operation will, in particular, be accompanied by a proposal to indicate the path from where you can get data to restore the system component storage.

We will consider the process of restoring the storage, indicating the source of data acquisition, a little later, in paragraph 4 of the article.

3. Restoring the system component store: PowerShell

You can restore system components alternative way– using a tool Windows PowerShell. This method is similar to the previous one: the Windows Update service is also used to restore the storage. And, accordingly, in this case an Internet connection is also required. The method using PowerShell will take longer than the previous method using the DISM utility, but the process of restoring the storage itself will be carried out more thoroughly.

Run PowerShell as administrator and enter:

Repair-WindowsImage -Online -RestoreHealth

Press Enter. If the system file storage is successfully restored, we will receive a report like the one shown in the screenshot below, where, in particular, the “Image Health State” parameter will be marked as “Healthy”. And this means that the system file storage has been restored. Now it is necessary to carry out the operation described in paragraph 1 of the article.

4. Restoring the system component store: Windows installation disk

You can resort to restoring the Windows component store indicating the source of data if there is no Internet or the two previous methods did not bring positive results. Source from which data for storage recovery is retrieved system components- This installation disk corresponding version and Windows edition. This can be physical installation media - a flash drive or disk, or it can be an ISO image with a distribution kit. The latter must be mounted in virtual drive by calling on it context menu and selecting the “Connect” command.

We connect a flash drive, disk or image, run PowerShell as administrator and enter a command like:

Repair-WindowsImage -Online -RestoreHealth -Source D:\sources\install.wim

The drive letter in this command is installation media subject to substitution. In our example, this is the letter D, and instead of it, in each individual case you need to substitute your own letter of the flash drive, physical or mounted drive, as they appear in Windows Explorer. After entering the command, press Enter.

Based on the results of the operation, as in the previous case, its successful completion will be indicated by the “Healthy” state of the “Image Health State” parameter.

After restoring the storage, we launch the operation discussed in paragraph 1 of the article.

5. Windows 10 Update

You can restore the integrity of damaged Windows 10 system files by updating the system using the utility Media Creation Tool. It can be downloaded from the official Microsoft website. Windows 10 update is the longest and at the same time the most reliable way return the operating system to functionality. The process of updating Windows 10 takes approximately the same time as the process of reinstalling it. As part of this process, all damaged system files will be overwritten, user profile data, installed programs and entered system settings, and at the exit we will get the freshest, with all installed updates Windows 10 Anniversary Update.

Launch the Media Creation Tool. We accept license terms.

Select “Update this PC now.”

And wait for the update process to complete.

Have a great day!

If there are problems with your computer, it’s a good idea to check the OS to determine the integrity of the system files. Damage or deletion of these objects is often the cause incorrect operation PC. Let's see how you can perform this operation in Windows 7.

If you notice any errors during the operation of your computer or its incorrect behavior, for example, the periodic appearance of blue screen death, then, first of all, it is necessary. If this check did not find any faults, then in this case you should resort to scanning the system for the integrity of system files, which we will discuss in detail below. This operation can be done either by using the capabilities of third-party software or by using the launch of the embedded Windows 7 utility "SFC" through "Command line". It should be noted that even third-party programs are used only to activate "SFC".

Method 1: Windows Repair

One of the most popular third party programs to scan your computer for damage to system files and restore them if problems are found.

We will talk in more detail about the operation of this utility when reviewing Method 3, since it can also be launched by using Microsoft-introduced operating system tools.

Method 2: Glary Utilities

Next comprehensive program to optimize computer performance, with which you can check the integrity of system files, is . Usage this application has one important advantage over the previous method. It lies in the fact that Glory Utilities, unlike Windows Repair, has a Russian-language interface, which greatly facilitates the task for domestic users.

More detailed information About work "SFC" presented when considering the following method.

Method 3: "Command Line"

Activate "SFC" to scan for damage to Windows system files, you can use exclusively OS tools, specifically "Command line".

Attention! In order for SFC to not only check the integrity of system files, but also restore them if errors are detected, it is recommended to insert the operating system installation disk before starting the tool. This must be the exact disk from which Windows was installed on this computer.

There are several variations of using the product "SFC" to check the integrity of system files. If you need to scan without restoring missing or damaged OS objects by default, then "Command line" you need to enter the command:

If you need to check specific file to check for damage, you should enter a command that matches the following pattern:

sfc /scanfile=file_address

There is also a special command to check an operating system located on a different hard drive, that is, not the same OS in which you are working in this moment. Its template looks like this:

sfc /scannow /offwindir=Windows_directory_address

Problem launching "SFC"

When trying to activate "SFC" a problem may occur that "Command line" A message will be displayed indicating that the recovery service failed to activate.

Most common cause This problem is disabling a system service "Installer Windows modules» . To be able to scan your computer with the tool "SFC", it must be turned on.

Click "Start", go to "Control Panel".

Come in "System and safety".

Now press "Administration".

A window will appear with a list of different system tools. Click "Services" to make the transition to "Service Manager".

A window with a list opens system services. Here you need to find the name "Windows Module Installer". To make your search easier, click on the column name "Name". The elements will be built according to the alphabet. Having found the desired object, check what value is in its field "Startup type". If there is an inscription "Disabled", then you should enable the service.

Click RMB by the name of the specified service and select from the list "Properties".

The service properties shell opens. In chapter "Are common" click on the area "Startup type", where the value is currently set "Disabled".

A list opens. Here you should select a value "Manually".

After required value installed, click "Apply" And "OK".

IN "Service Manager" in a collumn "Startup type" in the line of the element we need, the value is set to "Manually". This means that you can now run "SFC" via the command line.

As you can see, you can run a computer check for the integrity of system files either using third-party programs or using "Command line" Windows. However, no matter how you run the check, it still performs it system tool "SFC". That is, third party applications can only make it easier and more intuitive to launch the built-in scanning tool. Therefore, specifically in order to produce this type check, there is no point in downloading and installing third-party software. True, if it is already installed on your computer for general system optimization purposes, then, of course, you can use it to activate "SFC" data software products, since this is still more convenient than acting traditionally through "Command line".

Not all errors are expressed in windows appearing on the desktop and the inability to perform any action. Much more often, they quietly accumulate on your computer and gradually slow down its operation. It is worth checking your device periodically for possible errors, and not only the system, but also HDD, and the registry. All methods described below also include automatic correction of detected faults.

How to check the system for integrity and errors

As a result of incorrect shutdown of the computer, exposure to viruses and other problematic situations, system files may be damaged or changed. The consequences of this are usually expressed in startup problems individual programs or turning on the computer, but sometimes they can be invisible to the user. Scanning your system for integrity is the first thing we recommend doing when you encounter problems with Windows 10.

Via the sfc command

This is the main way to check the integrity of the operating system. It is intended for cases with problems with the computer's performance. The sfc command only performs a superficial analysis, which cannot be used to find and correct all possible errors. However, this method is quite fast and ideal for preventative computer scanning. A more in-depth analysis is possible through the DISM utility, which is described below.

The sfc command cannot fix errors in files that are used by the system in this moment. If you receive a notification about such failures, be sure to run the DISM utility.

Via DISM utility

The DISM utility conducts a full system scan for errors and integrity violations. The analysis it launches takes quite a long time, but allows you to identify and correct all violations in the operation of the system. To carry out the verification, you will definitely need the Internet.

Before running the utility, disable your antivirus and that’s it running programs, and also try not to use the computer during the analysis.

Open a command prompt as an administrator and type dism /Online /Cleanup-Image /RestoreHealth.

For a full analysis of system integrity, enter the command dism /Online /Cleanup-Image /RestoreHealth in command line

There are several more commands in this utility that may be useful to you:

dism /Online /Cleanup-Image /CheckHealth to obtain information about the status and presence of damage to Windows components;
dism /Online /Cleanup-Image /ScanHealth to check the integrity and damage of the component store.

How to check your hard drive for errors

All data recorded on the computer is divided into small fragments, which are placed on sectors of the hard drive. During computer operation, these sectors can become damaged. Damaged sectors are the “errors” of the hard drive. When a hard drive tries to read information from a damaged sector, the reading process is “stuck.” The result of this is that it takes an unreasonably long time to turn on the computer and launch some programs.

It is impossible to fix damaged sectors, but you can prevent the hard drive from working with them. The process of finding and eliminating these sectors is called defragmentation. Even if no errors are found, as a result of defragmentation, the space on the hard drive will become more organized, which will also speed up the process of reading information.

Through "Explorer"

This is the main way to check a hard drive. Windows 10 should do this automatically, without the user's knowledge, in order to maintain order on the hard drive. Defragmentation will take you about an hour, so it is better to leave it overnight.

Via the “Control Panel” (storage diagnostics)

Many people mistakenly believe that the storage diagnostic utility can be used to analyze the hard drive. Actually this is not true. The storage diagnostic utility is indeed present on the hard drive, but it starts automatically, and you will not be able to perform analysis through it. This way you can only find out the results last check hard drive status.

If you just want to run an analysis, use the previous method, but instead of “Optimize,” click “Analyze.”

Via command line

This method eliminates the restoration of order on the hard drive, which is done during regular defragmentation. Due to this, the process proceeds much faster. Correcting errors this way is recommended if you need to quickly recover information from damaged sectors.

To check without using the Internet, use the command chkdsk C: /F /R /offlinescanandfix.

Via PowerShell

Windows PowerShell is a powerful new command-line shell. She does the same thing as her predecessor, but has much more powers. PowerShell allows you to quickly and easily perform actions that are difficult or impossible for a regular command line. In our case, this will help avoid the need to restart the computer to check the sectors in use.

To check without using the Internet, use the command Repair-Volume -DriveLetter C -OfflineScanAndFix.

Video: how to check your hard drive for errors

How to check the registry for errors

The Windows Registry is a complex database of the operating system that stores all settings, changes, information about the computer and installed programs. If a registry error occurs, the consequences can be very different: from a blue screen when turned on and complete system inoperability to an undeletable shortcut and other little things.

Most unpleasant feature registry errors is their layering. One minor error in the registry can lead to several others, which will ultimately lead to dire consequences. This is why regularly scanning the registry for errors and eliminating them early is extremely important to keep your computer running at peak performance.

Through built-in tools

Windows 10 has a built-in utility for checking the registry for integrity, but it is quite weak and does not find most errors. Your best bet would be to use one of the third-party programs described below.

This method can only fix critical errors: many registry errors will remain untouched.

Open a command prompt as an administrator, type scanreg /fix and press Enter.

Enter the scanreg /fix command to check the registry through the built-in Windows utility 10

Via CCleaner

CCleaner is the most popular and reliable program for cleaning your computer. It is designed to clean debris from hard-to-reach places that the system itself cannot reach. However, CCleaner has earned its popularity precisely for its registry cleaning function, which allows you to quickly find and erase registry errors without affecting anything important.

Via Glary Utilities

Glary Utilities- Very functional program, which will work in the tray and keep your computer clean and tidy. Cleaning the registry is just one of the available functions to improve the performance of your computer. Glary Utilities may seem intrusive to many, but for less experienced users it will be a very useful assistant.

Via Wise Registry Cleaner

Wise Registry Cleaner is a program designed not so much to treat the registry, but to complete cleaning from stale and unclaimed parameters. Cleaning the registry using Wise Registry Cleaner is quite serious and can affect important files that the program will find unnecessary. When you launch Wise Registry Cleaner for the first time, you will be prompted to do backup copy registry, which is better to agree to. If important files are affected, you can always rollback.

Wise Registry Cleaner is available only on the English version of the official website: if you change the page language to Russian, you will be offered another Wise program Care 365.

Even if you don't see any errors on your computer, it's best to scan it periodically. This will ensure stable work system and will help solve most problems before they become noticeable.

). In this case, some begin to worry and look for all sorts of reasons and ways to eliminate freezes.
I will not repeat myself and write why this happens, because... The article is not about this and I have already given a link to solving problems above.
I'd rather show you one interesting way, which will help check the system for errors.

Few people know, but in Windows OS there is one useful “little thing” that can search And correct errors in the system itself. Moreover, it will not touch third-party programs, but will only check its system files. This is useful and interesting because many do not think that the reason may be hidden in the system itself, but feverishly begin, and so on. All in all . Yes, it is useful and can lead to good result, but with all these actions it is good to remember something else that I will write about below.

I already wrote a little about this function in the article, which can also arise due to a failure in system files, which are often forgotten. But still, within the framework of this article, I will repeat...

So, let's run:

and enter it into sfc /scannow:

The system check will begin:

All you have to do is wait.

For those interested, here is a description of the command and keys.

sfc
Where:
/scannow – immediately scans all protected system files.
/scanonce – scans all protected system files once at the next system boot.
/scanboot – scans all protected system files at every boot
/REVERT – Sets the initial parameters to default.
/ENABLE – Enable normal operation Windows file protection
/PURGECACHE – Clear file cache and check files immediately
/CACHESIZE=x – Sets the file cache size

In the command line (Start -> Run -> cmd) we write the command sfc / and the desired key.

After the check is completed, the system will report the results and ask you to reboot.

That's all I have. Thank you all for your attention.

Hello friends! This article is a logical continuation of the recently launched epic about the fight against. And now the author will share with you one more effective method eliminate such troubles.

Therefore, the theme of the story will sound like this: team SFC scannow in Windows 7 and 10. We will also consider the question of why sometimes it cannot restore system files. That is, simply put, it refuses to work.

So, what kind of command is this and what is it for? So, SFC scannow is system utility, which serves for automatic check and restoring important operating system files.

It is quite easy to use, but sometimes various nuances may arise. So let's get down to business to understand everything. All further actions will be shown on Windows example 10, although in Win 7 everything is done almost the same way.

Then enter the command itself:

The system scanning process will begin, which may take quite a long time. So now all we can do is wait and hope that this command can fix everything.

After finishing the work, a report will appear telling you about real situation business You will also have the opportunity to familiarize yourself with the log file and understand in detail the important details:

But as you can see in the screenshot above, in our case everything did not go very smoothly. Damaged files were detected, but Windows 10 was unable to restore them.

This happens because the SFC scannow parameter is unable to restore those system files that are currently being used by the operating system itself. In general, a real paradox emerges.

But nevertheless, there is a way out of this situation. You need to try the above steps in the Windows Recovery Environment. How to enter it on the tenth version of the system is described in great detail in

Well, on the seven you will have to use a previously prepared boot disk and set it as priority on the computer. Alas, there is no other way.

Well, we continue the process of treatment and file recovery using Win 10 as an example. And now you will need to enter a small series of commands. The first one will be like this:

With the next function we will display a general list of those installed on computer hard disks. Each of them has already been assigned personal number, which we will need in the next step:

Now select the disk number zero discovered above, since it is the only one in the system:

At this stage, all that remains is to sort out the hard drive in order to understand which one is the system one, that is, with Windows installed:

After necessary information received, you can, so to speak, and move on from here. To do this, enter the following command:

And now, finally, the hour of truth has come. Now we will check the system files again and, in case of problems, try to restore them. So, let's start the process:

In this expression, the letter "C" indicates a logical partition hard drive, on which it is installed operating system. Also, when entering, it is very important to ensure that the input is correct, in particular, to put problems where necessary.

Now we can only hope that after the scanning process is completed, the message “Protection Windows resources did not detect any integrity violations.”

What else can you tell about the SFC scannow command? For example, this parameter will be able to display a log with the results of work on the desktop in the recovery environment:

And the following method will allow you to check and restore specifically specified file. For example, in work Windows given the parameter will look like this:

Where "kernel32.dll" represents the name the desired file. And the entire expression is the path to the directory where it is located. The exact same command in the Windows 7 and 10 recovery environment will be slightly different:

Well, friends, now you know why sometimes the SFC scannow command in Windows 7 and 10 cannot restore system files. But in conclusion, it’s worth saying that there is another similar utility, which we also .

If you suddenly have any questions, feel free to ask them in the comments to the article. Now you can relax a little and watch a very interesting video. Guys, you definitely need to watch this.