To run DISM restore health, open Command Prompt as Administrator. Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter. Windows will scan for corrupted system files and automatically repair them using Windows Update. The process may take several minutes, so wait until it reaches 100%. Once finished, restart your computer. For additional verification, run sfc /scannow afterward to check and fix any remaining system file issues. This method helps resolve Windows errors, update failures, and stability problems without reinstalling the operating system.