Operating Systems: Windows 10, 8, 7, Vista, XP
Corrupted windows system files can cause lot of issues like Windows Update failure, Booting issue and other runtime errors.
Only For Windows 10 & Windows 8 (Windows 7, Vista & XP – Skip this step)
1. DISM tool to restore corrupted files
DISM (Deployment Image Servicing and Management) tool is designed to fix corrupted system files by copying the right version of the corrupted file using Windows update client or a copy from a local installation source like DVD/shared folder. (This tool is not available in older operating systems like Windows 7 , Vista, XP etc)
Open Command prompt as administrator and type these commands one by one.
- Command to check health of the image: Dism /Online /Cleanup-Image /CheckHealth
- To scan : Dism /Online /Cleanup-Image /ScanHealth
Command 1
Dism /Online /Cleanup-Image /CheckHealth 
Command 2
Dism /Online /Cleanup-Image /ScanHealth
If you find any corruption then execute “DISM /Online /Cleanup-Image /RestoreHealth“. DISM will try to restore/fix the corrupted file using Windows update. Usually it may take some time to complete the process (up to 30 mins).
Command 3
DISM /Online /Cleanup-Image /RestoreHealth
You can execute health scan and restore command together as shown below.
DISM.exe /Online /Cleanup-image /Scanhealth && DISM.exe /Online /Cleanup-image /Restorehealth
2. System file check (SFC)
SFC is a built-in Windows tool to scan the and check the integrity of system files. If any of the system files is corrupted or damaged then SFC will try to fix it by replacing it from the backup copy .
Follow theses steps:
Open Command prompt as administrator. Click Start menu , type “Command” or “CMD.exe“.
Right click “Command prompt” and select “Run as administrator“.
Type “SFC /scannow” and press enter key to start verification.
