Please do not change permissions on the C drive, that will cause huge problems with Windows and you would need to re-install Windows.
With the number of problems you are experiencing the best option is to perform an in-place repair with the Windows 11 ISO.
Please follow the steps, this is then just an update and your personal files, settings and installed software will not be affected.
Click this link:
https://www.microsoft.com/en-us/software-downlo...
to download the Windows 11 ISOWhen the ISO file completes downloading
Disconnect from the Internet
Disconnect all external devices with the exception of a mouse or keyboard.
Temporarily disable any 3rd party Anti-virus you may have installed
Then, in Windows File Explorer, double click the ISO and then run Setup.exe and select the upgrade option.
OK, I've done all this however if I don't have the internet/wifi on then setup doesn't do anything, when I have WiFi on there's no option to upgrade it just checks for updates
And once this has completed I get this window. It says that it will leave all my files and apps so I assume the myASUS app will remain? Despite not wanting bloatware it does actually have some useful controls in that aren't in Windows 11, especially different screen calibrations.