You will have to make use of the Registry Editor to fix this issue.
If there are any incorrect or missing entries, then it would cause issues with your control. Windows Registry controls many of the system’s settings.
Incorrect or Missing Windows Registry Entries To fix this, you can reinstate the older version of the OS. The graphics card driver may lose its compatibility with your system if you upgrade the OS to the latest version. The simplest solution for this is to update or reinstall the key drivers. The error can be due to a corrupted, outdated, or non-compatible driver. If there is something wrong with the display driver or graphics card drivers, then it will lead to your Nvidia control panel missing error. The following are the commonly reported reasons for your Nvidia control panel to disappear from your system tray or Desktop context menu Driver Issues Reasons for your Nvidia Control Panel to go Missing
