This error happens when the program detects it cannot temporarily edit the system configuration in order for the app to work.
If you have tried to run the program as admin, then my best guess is that you are using some kind of third party antivirus product that is blocking Startup Timer's access to the system. If that is the case, please use the ignore or exclude feature of your antivirus product so it doesn't block Startup Timer. How this is exactly done depends on what antivirus you use, and you should consult its documentation for the exact steps.
