If the steps above don't work, you may need to reinstall Windows. For more info, see Windows 10 recovery options. Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

Windows Registry Checker automatically scans the system registry for invalid entries and empty data blocks when it is started. If invalid registry entries are detected, Windows Registry Checker automatically restores a previous day's backup.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys. First, you'll need to download the troubleshooter. Download troubleshooter.

There are two ways to open Registry Editor in Windows 10: In the search box on the taskbar, type regedit , then select Registry Editor (Desktop app) from the results. Right-click Start , then select Run .

What it fixes. The troubleshooter helps fix problems that: Corrupt registry keys on 64-bit operating systems. Corrupt registry keys that control the update data. Prevent new programs from being installed. Prevent existing programs from being completely uninstalled or updated.

How to back up and restore the registry in Windows - Microsoft Support. Windows 11 Windows 10 Windows 8.1. Back up the registry manually. Select Start , type regedit.exe in the search box, and then press Enter. If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.

Resolution. To fix this problem automatically, run the "Fix problems that programs cannot be installed or uninstalled" troubleshooter to repair issues that block program installation or removal because of corrupted registry keys.

Fix a corrupted user profile in Windows - Microsoft Support. Windows 10 Windows 8.1 Windows 7. My computer is on a domain. Open Microsoft Management Console by selecting Start , typing mmc into the search box, and then pressing Enter. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

Windows 10 Windows 11. The steps to access the repair tool vary depending on your operating system. Right-click the Start button (lower-left corner) and select Apps and Features on the pop-up menu. Select the Microsoft Office product you want to repair and select Modify.

This article describes the command-line switches you can use when you run the MS-DOS version (Scanreg.exe) or the Windows version (Scanregw.exe) of the Registry Checker tool. More Information Syntax. MS-DOS Version: Scanreg.exe [/backup] [/restore] ["/comment=<text>"] [/fix] Scanreg.exe [backup] [/restore] ["/comment=<text>"] [/fix] [/opt]