Head to the Start menu search bar, type in ‘cmd,’ and launch an elevated Command prompt. To run the DISM scan, follow the steps below: Whereas SFC mainly works to repair your system files, the DISM fixes the errors in your hard drive. Similar to the System File Check, DISM can fix your system when things go corrupt. Also, make sure you create a Restore point for future such incidents beforehand. If that’s the case, then, you can jump straight to the next method. Note that if this button is greyed out on your screen, then you probably don’t have a Restore Point on your PC in the first place.

From there, select the Restore Point you'd like to restore, and follow the on-screen instructions to complete the process. Now, in the System Properties dialog box, select the System Restore… button. Head to the Start menu, type in ‘system restore,’ and select the best match.

The only thing you’ll have to be wary of is if you’ve created a System Restore yourself before. Naturally, you can use the System Restore to fix your corrupt Windows registry. So, it restores everything back to the way it was before things went bust. It repairs the Windows environment by reverting to the files and settings that were saved in the restore point.” When an installation failure or data corruption occurs, System Restore can return a system to working condition without you having to reinstall the operating system. “System Restore takes a “snapshot” of some system files and the Windows registry and saves them as Restore Points. A System Restore is a free Windows tools that lets you reverse your PC's state to a point of time when everything was working smoothly.

Win 7 registry repair command prompt