Hello there! I am Charity, I'm an Independent Advisor. I'm glad to help you today!
Thank you for the information. If you unlink your Microsoft account from your PC, several things will happen regarding the games and services linked to that account, such as Minecraft and OneDrive.
Games: Games like Minecraft that are tied to your Microsoft account will likely become inaccessible on your new PC if you unlink the account. This is because the game's license is associated with the Microsoft account. You will need to sign back into Minecraft with the same Microsoft account to access the game. However, you can sign in again with the unlinked account after switching to a new one if you want to regain access to the game.
OneDrive: Unlinking your Microsoft account will stop OneDrive from syncing, but your local files won't be deleted. They will simply stop syncing with the cloud. You can re-link OneDrive to continue syncing or access your files directly through the OneDrive web interface.
In summary, unlinking your Microsoft account will not delete your files or installed games, but you will lose access to services like game licensing and cloud syncing until you sign in again with the original Microsoft account.
Please let me know if you have any more questions, I'll do my best to respond as soon as possible.
Kind Regards,
Charity (Active hours 10PM~10AM GMT+08:00)