i have AMD Athlon 2400+ ,MSI motherboard with via KM400 chipset,512 Mb ddr(400 Mhz) ram.i m using Win XP sp2. My problem is when i using multitasking my pc gets hang and after few second it gives error message that my graphic drivers gets out ,u need to restart the computer.I dont know the exact error specification.It happens quite regularly. please help........ 