Hello,
This means the user profile for your user is corrupted. Windows cannot get into your user profile, hence it creates a temp user profile for you.
Can you please first confirm, how much free space does your C drive have at the moment? That's the most common reason when user profile runs into issue.
Please do not try to save any files in your temp user profile as each restart will erase everything. At the moment, do not move files around. Once I find out how much free space you have left on C drive, we will come up with a plan for next steps.