Fix Windows Error 0x80070643 Failed To Install Update Or App (2025)

Updated: 11/29/2025

You try to install a Windows update or a Microsoft Store app, watch the progress bar creep forward, and then see Install error 0x80070643 or Failed to install. Retrying produces the same code, leaving your system stuck without important patches or apps. This error commonly appears when system components like Windows Installer, .NET Framework, or the update cache are damaged, but a structured set of steps can usually fix it without reinstalling Windows.

Table of Contents

Method 1: Run System File Checker And DISM To Repair Core Files

If SFC reports that it found errors it could not fix, run the Deployment Image Servicing and Management tool with the following command.

DISM /Online /Cleanup-Image /RestoreHealth

After DISM completes, restart your PC, run sfc /scannow once more, then try installing the update or app again to see if Error 0x80070643 is resolved.

Method 2: Reset Windows Update Components And Clear Cache

Start the services again using these commands.

net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Close the window, restart your PC, then open Windows Update and try installing the failed update again, watching for any repeat of Error 0x80070643.

Warning: Do not delete the SoftwareDistribution or catroot2 folders outright, renaming them is safer and lets you roll back if needed.

Method 3: Repair .NET Framework And Windows Installer For App Failures

After repairing .NET and Windows Installer, try running the same application installer or Microsoft Store install again. If it still fails with 0x80070643, check the application’s own log files or Windows Event Viewer for more specific clues about what is blocking the installation.