Hi, I am Dave, I will help you with this.
There are still some hard blocks in place for the 24H2 update on some hardware configurations and also some PC's installed with some games and apps, Microsoft indicate we should not try to force the 24H2 update, but if you do want to try to install that update, the most successful method would be to us the Windows 11 ISO, if there is a hard block on your system for that 24H2 update, you will be notified at the start of the installation that your system is not ready for the update.
Please follow the steps, this is then not like re-installing Windows, it is just like an update and your personal files, settings and installed software will not be affected.
Click this link:
https://www.microsoft.com/software-download/win...
to download the Windows 11 ISO
When 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 Install option.