Additionally, make sure you have all the latest updates and drivers installed for your Windows 11 system. Sometimes, updates can resolve compatibility issues.
If you're considering rolling back to Windows 10, you can follow the instructions on windows 10 pro key to obtain a valid Windows 10 key...
One suggestion I have is to try running iVMS 4200 in compatibility mode. Right-click on the program's shortcut, go to "Properties," and under the "Compatibility" tab, you can choose to run it in compatibility mode for Windows 10. This sometimes helps with compatibility problems.