Try each of these steps
How to Fix NVIDIA Control Panel Not Opening
If you are having trouble opening the Nvidia Control Panel on your PC, there might be a problem with your system or the control panel itself. For example, there might be a minor glitch on your PC, the required Nvidia services are not working, or you don’t have the right drivers installed on your system.
Fortunately, you can troubleshoot these common issues one by one and see if the Nvidia Control Panel opens.
On a Windows 10 PC, the easiest way to fix most minor issues is to restart your PC. When you do this, many temporary items on your PC are reset. This gives your programs a new chance to load from scratch.
