Windows 11 operating systems have thousands of files, some of them are constantly open and used by the system or by installed applications or programs. It is nothing strange that sometimes due to this activity or for other reasons such as viruses, power outages, etc. They are damaged. Windows 11 sometimes repairs these damages automatically as will be seen below, but when there is some kind of conflict on our computer, one of the first measures should be to manually check the integrity of the operating system files. It is necessary when we receive unexpected error messages, applications close for no reason or the computer reboots seemingly for no reason. How to do it? It is not difficult at all. Windows 11 includes an easy-to-use tool, although little known, called “SFC” or “Microsoft Resource Checker.” In this article, we explain in a detailed and simple way, how to use this application to know if there are damaged system files and in that case repair them.
SFC, the Microsoft Resource Checker examines the integrity of all protected system files and replaces the wrong versions with the correct ones from Microsoft. In a few minutes check and check all system files, if you find any damaged replace it with an original copy. It searches for it in a database created during the installation of the system called DLLCACHE, if it is not available, it requests that we insert the installation disk, extract it from it and replace it. SFC works only through the command line (the black MSDOS window) that is, it does not have the screen or the executable like other applications. No advanced knowledge is necessary, just follow the instructions and be guided by the images shown below.
How to use SFC to check for corrupt system files?
There are several ways to run SFC, first we will explain how to use it normally and then how to do if Windows 11 for some reason does not start.
Run SFC from Windows 11
1- Open the CMD console or Command Prompt.
In Windows 11 press the Windows + X keys and in the menu click on: “Command Prompt (Administrator)” In Windows 11 open the “Run” command with the Windows 11 + R keys, type CMD and press the Enter key. Make sure the Administrator box is checked .
2- In the black window of the console type: SFC / SCANNOW and press the Enter key.
3- Wait for the review and repair process to finish. If it is indicated to insert the installation disk, use it. If you have installed Windows 11 using a USB stick, connect it.
Run SFC when Windows 11 does not work properly
1- Turn on the device, after the POST stage press the F8 key, a menu with different options will appear. Use the arrow keys to select the option: “Command Prompt”.
2- In the console window type: SFC / SCANNOW and press the Enter key.
Run SFC when Windows 11 does not start
1- Insert the Windows 11 installation disk, restart and wait for the computer to boot from the disk.
2- Choose “Install now” and after the temporary files are copied, select the option to start the “Command Prompt”.
3- In the console window type: SFC / SCANNOW and press the Enter key.
View SFC reports
Although it is not necessary, if you are curious you can see the report generated by SFC and know the changes and adjustments made.
It will help you a lot if you try to solve any of the annoying blue screen errors and want to check if Windows 11 replaced the system file that caused them.
The entire report with the results of the SFC command is saved in a LOG or text file, which is in the path “C: \ WINDOWS 11 \ LOGS \ CBS \ CBS.LOG”.
Windows 11 Interface
Locate it, copy it to the desktop and open it with Notepad. The information in the LOG contains, in addition to this latest revision, the details of all the revisions made by Windows 11 in the last 10 days. If you do not have access to the Windows 11 interface, you can read it in the same CMD console. For that enter: More is used to pause the console and be able to read more easily. Create log on the desktop with the SFC report – Another option is to create a log on the desktop with errors found with the tool. To do this, enter the following instructions in the console or Command Prompt and press Enter.