Weird freeze and following problems.

[RobN]

Twice (just now and a few years ago) I have experienced a weird freeze-up of IL-2 which I can only recover from by getting the desktop back and using Task Manager to stop the program. However, the result is that other programs are affected. The graphics of Firefox and Outlook become corrupted - there are lines and dots everywhere and some sites fail to load.

The only way out is to reset the PC with the button, as attempting to do so via windows does nothing.

Does anyone know what might be happening?