Forum Discussion
If the game works with a new Windows user account, i.e. a new user profile, this means that there are serious problems with the old user profile.
An in-place upgrade in Windows, also known as a repair install, might fix the problem, but I can't promise it.
Here you will find an Microsoft Video Guide about it.
Here is the Website to create the Install medium.
This is normally a very safe process, but you should make a full backup of all your important data anyway. (And not just before such on operation.) 😉
Make sure that "Keep Personal files and Apps" is marked before you click "install".
It might be easier to just move your main account to the new user profile here is a MS help article about that or to just use the new user account to play the game, you can switch to the second profile in a matter of seconds without even rebooting the machine.