Checking the integrity of system files in Windows 7

In case of computer malfunction, it is not a superfluous solution to check the operating system to verify the integrity of the system files. It is the damage or removal of these objects that often causes the PC to malfunction. Let's see how you can perform the specified operation in Windows 7.

See also: How to fix NETIO.SYS BSODs in Windows 10

Verification methods

If you notice any errors during the operation of the computer or its incorrect behavior, for example, the periodic appearance of the blue screen of death, first of all, you need to check the disk for errors.

If this check did not find any malfunctions, then in this case you should resort to scanning the system to check the integrity of the system files, which we will discuss in detail below.

This operation can be performed using the capabilities of third-party software and using the utility launch "SFC" built-in Windows 7 via the "Command line" . It should be noted that even third-party programs are only used to activate the "SFC" .

Method 1: Windows repair

One of the most popular third-party programs to scan your computer for damaged system files and restore them if problems are found is Windows Repair.

    1. Open Windows Repair. To start a scan for system file corruption, immediately go to the section "Steps prior to repair" click on the tab "Step 4 (optional)" .
    2. In the window that opens, click on the button "To check" .
    3. Se start the Windows standard utility "SFC" , which performs a scan and then displays its results.

We will talk in more detail about how this utility works when considering the Method 3 as it can also be run using the operating system tools implemented by Microsoft.

Method 2: Glary Utilities

Glary Utilities is another comprehensive computer optimization program that can be used to verify the integrity of system files. The use of this application has an important advantage over the previous method. It is based on the fact that Glory Utilities, unlike Windows Repair, has an interface in Russian, which greatly facilitates the task for home users.

    1. Launch Glary Utilities. Then go to section "Modules" changing to the corresponding tab.
    2. Then use the side menu to navigate to the section "Tools" .
    3. To activate an integrity check for operating system items, click the item "Restore system files" .
    4. Thereafter, is launched the same system tool "SFC" in the "Command line" , which we already talked about when describing the actions in the Windows repair program. It is he who scans the computer for system file corruption.

More detailed information on the operation of the "SFC" when considering the following method.

Method 3: "Command line"

You can activate "SFC" to search Windows system file corruption using only operating system tools, that is to say , the «Command Line» .

  1. To call "SFC" Using the built-in tools of the system, you should immediately activate the "Command line" with administrator privileges. Click on Home . Click on "All the programs" .
  2. Look for the folder "Standard" and access it.
  3. A list opens in which you must find the name "Command line" . Right click on it ( RMB ) and select "Execute as an administrator" .
  4. The shell is running "Command line" .
  5. Here should ingresar a command that will launch the tool "SFC" with the attribute Scannow . Pay in:sfc /scannowPress Login .
  6. Here at the  "Command line", the tool "SFC" is enabled to check for system file problems. The progress of the operation can be monitored using the information displayed as a percentage. Can't close the "Command line" until the procedure is complete, otherwise you will not know about your results.
  7. After the scan is complete, an inscription will appear on the "Command line" that indicates its completion. If the tool did not detect any problems with the operating system files, information that the utility did not detect any integrity violations will be displayed below this inscription. If problems are still found, your decryption data will be displayed.

Attention! So that SFC can not only verify the integrity of the system files, but also to restore them in case of errors, 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 on the use of the tool SFC to verify the integrity of the system files. If you need to scan without restoring the OS objects that are missing or corrupted by default, in the "Command line" you need to enter the command:

sfc /verifyonly


If you need to check if a specific file is damaged, you need to enter the command corresponding to the following pattern:

sfc /scanfile=адрес_файла


Also, there is a special command to check the operating system located on a different hard drive, that is, not the operating system you are currently working on. Your template looks like this:

sfc /scannow /offwindir=адрес_каталога_с_Виндовс


Lesson: Enabling the Command Line in Windows 7

Problem starting «SFC»

When trying to activate the "SFC" , a problem may occur and a message may appear on the "Symbol of the system" which indicates that the activation of the recovery service was unsuccessful.

The most common cause of this problem is deactivation of system service Windows Module Installer . To be able to scan the computer with the tool "SFC" , it should be on.

  1. Click on "Start" , go to "Control Panel" .
  2. Go to "Security system" .
  3. Now click on "Administration" .
  4. A window will appear with a list of the various system tools. Click on "Services" to go to "Service manager" .
  5. A window opens with a list of system services. Here you should find the name "Windows Module Installer" . To facilitate the search, click on the column name "Number" . The elements will be built according to the alphabet. Once the desired object is found, check what value it has in the field "Startup type" . If there is an inscription "Disabled" , you must enable the service.
  6. Click on RMB In the name of this service in the list, select «Properties» .
  7. The service properties container opens. In the General section, click on the Startup type area which is currently configured as Disabled .
  8. The list opens. Here you need to select the value "Handbook" .
  9. After setting the desired value, click "Apply" y "To accept" .
  10. In "Service manager" in the column "Startup type" in the line of the element we need, the value is set "Handbook" . This means that you can now run "SFC" to via the command line.

As you can see, you can run a computer check to verify the integrity of system files both with the help of third-party programs and with the "Command line" Windows. However, no matter how you run the check, the system tool "SFC" he still performs it. Namely, third-party apps can only make it easier and more intuitive to launch the built-in scan tool. Therefore, there is no point in downloading and installing third-party software specifically to perform this type of verification. True, if it is already installed on your computer for general system optimization purposes, then of course you can use these software products to activate "SFC" , as it is still more convenient than traditionally acting through"Command line" .