Your Windows 11 Build No. indicates your system is fully up to date, and includes the latest October update, but the symptoms you describe indicate there may be an update stuck on your Windows startup process.
Click your Start Button, type cmd then right click Command Prompt and choose 'Run as Administrator'.
Run this command and hit Enter:
net stop wuauserv
Leave Command prompt open.
Open File Explorer, on the View ribbon, temporarily turn on 'Hidden Items'
Navigate to C:\Windows\SoftwareDistribution\Download
Delete the entire contents of the Download folder
Close File Explorer
In Command Prompt, run this command and hit Enter:
net start wuauserv
When that completes, close Command Prompt and restart your PC