2. Fix Windows 11 Update KB5063878 Not Installing Install Error 0x800f0983

“Getting error 0x800f0983 while installing KB5063878 on Windows 11? Don’t worry—I’ll show you step-by-step fixes, so you can update your PC without stress.”

“Microsoft confirmed KB5063878 has caused issues with some SSDs. If you notice slowdowns, consider pausing or uninstalling the update. Always back up important files before continuing.”

“First, restart your PC, free up at least 20 GB on your C drive, turn off any VPN or proxy, and sync your date and time. Then run the built-in Windows Update Troubleshooter: Settings → System → Troubleshoot → Other troubleshooters → Windows Update.”

“If that didn’t work, reset the update cache. Open Command Prompt as admin and type these commands:”

net stop wuauserv
net stop bits
net stop cryptsvc
net stop msiserver
ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
ren %systemroot%\System32\catroot2 Catroot2.old
net start msiserver
net start cryptsvc
net start bits
net start wuauserv

“This forces Windows to rebuild the update folders.”

“Next, repair system files. In the same Command Prompt, run:”

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

“When both finish, restart and try the update again.”

“If updates keep failing, download KB5063878 manually. Go to the Microsoft Update Catalog, search for KB5063878, download the correct version for your system, then double-click to install.”

“Still stuck? Try Windows’ built-in repair reinstall. Go to Settings → System → Recovery → under ‘Fix problems using Windows Update’ click Reinstall now. This keeps your files and apps but refreshes system files.

If that’s not available, download the latest Windows 11 ISO, mount it, and run setup.exe with ‘Keep personal files and apps’ selected.”

“If nothing works, pause updates for a few days until Microsoft releases a fix. Or if KB5063878 did install but slowed your PC, uninstall it from Settings → Windows Update → Update history → Uninstall updates.”

“And that’s it! One of these steps should fix 0x800f0983 on KB5063878. Drop a comment with the fix that worked for you, and don’t forget to like and subscribe for more quick Windows solutions.”