I can't get anything I download/create to run.

This is the error that i get when i try to run the program.
Unhandled Exception: System.UnauthorizedAccessException: Access to the path “C:\Users\Quinn\Desktop\Unity Projects\Game\Temp\Assembly-CSharp.dll.mdb” is denied.

I’ve had a similar issue; I’ve found the best way to resolve it is to open a script, edit it a little bit (like deleting a character), save it, and then edit it back to its original form and save again. Let me know if that works for you.