Hi, I'm Bernard. I'm happy to help!
Kindly follow the steps provided in the AI Answer. If the issue persists, I recommend manually adding the account by following the steps below:
On your PC:
Go to Settings> Accounts > Under Microsoft Account, click Sign in > Then follow the prompt to sign in to your Microsoft Account.
Once done, kindly wait for 24 hours for the PC to sync with your Microsoft account.
If the issue persists, kindly go to: https://account.microsoft.com/devices
Select Register device
Then follow the prompts to register the device.
Note: It will ask for the serial number of the PC to get that:
Open Terminal (Admin) or Command Prompt (Admin) (Press the Windows key + X, then select Terminal (Admin))
Copy, paste, and enter the command:
wmic bios get serialnumber