Fix Windows 11 Update Error Your Device Is Missing Important Security Updates Make Sure To Keep Your Device On and Plugged In So Updates Can Complete
Step 1) Start App Readiness Service
Step 2) Move $WinREAgent folder to different location
Step 3) Run Update Troubleshooter
Step 4) Restart Windows Update & Background intelligent transfer service
Step 5) Use Windows 11 Installation Assistant
https://www.microsoft.com/en-us/software-download/windows11
Step 6) Use Microsoft Update Catalog
https://www.catalog.update.microsoft.com/Home.aspx
Step 5) 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 6) Use Media Creation Tool
https://www.microsoft.com/en-us/software-download/windows11

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