If you are infected with System Check it is important that you do not delete any files from your Temp folder or use any temp file cleaners. This is because when the infection is installed it will ...

Using this System File Checker (SFC) command you can replace, restore or repair a single file which may be potentially damaged or corrupted on Windows 11/10.

If you can't start Microsoft Store apps then you need to check if THESE setting or default registry or file permissions have been modified.