The OS is Windows 7 Home Premium 64-Bit, .NET framework is version 4, and the reason why I said it was related to the .NET framework was because the alert pop-up referred to csc.exe in the microsoft.NET framework.

Also, the reason why I use a screenshot utility is because sometimes I have to take a few screenshots in short succession, and the method you described doesn’t really cut it.

EDIT: I uninstalled, the reinstalled Screenpresso, and it seems to have done the trick. I’ll let you guys know if it happens again.