If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. Run the System File Checker tool (SFC.exe)

System File Checker is a utility in Windows that checks for problems with files on your computer. To run it, follow these steps: Make sure you've installed the latest updates for Windows, and then restart your machine. To find out more, read Update Windows.

Select View and print detailed performance and system information. In the System section, you can see what type of operating system you're currently running under System type, and whether or not you can run a 64-bit version of Windows under 64-bit capable.

If an update fails to install because of problems related to system files or components, you might see the following message in the Windows Update page in Settings: Reinstall your current version of Windows to repair system files and components.

Download this hotfix, and then run the following command to extract the Windows6.1-KB982929-x64.msu file into the temporary folder: 417821_intl_x64_zip.exe –x. Use the following commands to view each store-keeping unit (SKU) or index in the .wim file: Dism /Get-WimInfo /WimFile:<pathto>boot.wim.

Use the 32-bit installer if you’re using a 32-bit version of Windows and the 64-bit installer with a 64-bit version of Windows. To determine which version of Windows you’re using, follow the steps in Method 1 or 2. If one method doesn’t work, try the other.

You can check troubleshooting history to see if this troubleshooter has been run on your device by going to Start > Settings > Update & Security > Troubleshoot > View troubleshooting history and looking for the following: Windows Update troubleshooter. Automatically repair system files and settings to improve device security.

If you have installed the update KB2821895, and then run the System File Checker using the command sfc /scannow, the scan reaches 100% complete, and you receive the following error: Windows Resource Protection found corrupt files but was unable to fix some of them.

Windows File Protection (WFP) prevents programs from replacing critical Windows system files. Programs must not overwrite these files because they are used by the operating system and by other programs.

Windows includes a tool called Microsoft System Information (Msinfo32.exe). This tool gathers information about your computer and displays a comprehensive view of your hardware, system components, and software environment, which you can use to diagnose computer issues.