Fix Error Code 0x800f0991 When Installing Windows 11 Update KB5048667
Step 1) Run Update Troubleshooter
Step 2) Restart Windows Update & Background intelligent transfer service
Step 3) Use Windows 11 Installation Assistant
[ Ссылка ]
Step 6) Use Microsoft Update Catalog
[ Ссылка ]
Step 4) Reset Windows Update Components
SC config trustedinstaller start=auto
net stop bits
net stop wuauserv
net stop msiserver
net stop cryptsvc
net stop appidsvc
Ren %Systemroot%\SoftwareDistribution SoftwareDistribution.old
Ren %Systemroot%\System32\catroot2 catroot2.old
regsvr32.exe /s atl.dll
regsvr32.exe /s urlmon.dll
regsvr32.exe /s mshtml.dll
netsh winsock reset
netsh winsock reset proxy
rundll32.exe pnpclean.dll,RunDLL_PnpClean /DRIVERS /MAXCLEAN
dism /Online /Cleanup-image /ScanHealth
dism /Online /Cleanup-image /CheckHealth
dism /Online /Cleanup-image /RestoreHealth
dism /Online /Cleanup-image /StartComponentCleanup
Sfc /ScanNow
net start bits
net start wuauserv
net start msiserver
net start cryptsvc
net start appidsvc
Name it Wufix.bat
Right-click on the Wufix file and click Run as administrator
Restart your PC
Step 5) Use Media Creation Tool
[ Ссылка ]
