[Mobhack]

If you did not adjust any game preferences, then you most likely did something outside the game in Windows. Since it was working fine before, that is most likely, methinks?.

Like - Installed a new graphics driver, or adjusted something else on the video card settings. Installed a Windows update (which may have a new driver?) - XP SP3 has just arrived and it seems some computers had problems with it (mine did not). Or perhaps somebody put your Windows task bar into auto-hide mode, or up the side of the screen, which as the installation instructions state, the game does not like.

Cheers
Andy