Thanks
Changing Hz refreshing didn't help much, then I got the resolution down to lowest possible (still above 640x480 though) and War 2 works like it should, although everything else is impossible to use in this mode. Seems like I can run the game in ridiculous settings then, would be better if I could have it like before, in normal resolution.
The card is NVIDIA GeForce 7050 PV / NVIDIA nForce 630a, but any uncontrolled actualisation seems unlikely, because whenever I connect the PC to my TV, it's not connected to the internet.