Learn how to use the System File Checker tool (SFC.exe) to scan and restore Windows system files that are not working or causing crashes. Follow the steps to run SFC.exe, view the scan results, and manually replace the corrupted files if needed.

Learn how to use PC Health Check app to check your device health, battery capacity, storage capacity, startup time, and Windows 11 eligibility. Find out how to install, update, and troubleshoot the app.

Learn how to run System File Checker (sfc /scannow) in Windows 10 to check and fix problems with files on your computer. Follow the steps to update Windows, open Command Prompt as administrator, and type the commands.

Safeguard holds prevent a device with a known issue from being offered a new feature update. Learn how to check if your device has any safeguard holds affecting its upgrade to Windows 11 and what to do if you see a message about deactivated safeguard.

Learn how to install and use PC Health Check, a tool that monitors device health and troubleshoots performance issues. Find out if your device is eligible for Windows 11 and get tips on battery, storage, and startup time.

The Safeguard holds affecting your device page shows known issues impacting your device and temporarily preventing it from upgrading to Windows 11 because of one or more safeguard holds. More information. Safeguard holds prevent a device with a known issue from being offered a new feature update.

Learn how to use Scanreg.exe to scan, backup, and restore the Windows registry for invalid entries and empty data blocks. Find out how to configure, start, and troubleshoot the tool with command-line switches and Scanreg.ini file.

Learn how to use the PC Health Check app or the Microsoft Compatibility Appraiser task to see if your device meets the system requirements for Windows 11 after changing your hardware. Find out how to refresh the eligibility assessment and what factors affect the upgrade offer.

Learn how to upgrade, check, and choose between 32-bit and 64-bit versions of Windows. Find out the benefits, requirements, and compatibility of 64-bit systems.

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.