Working on a laptop here with the same problem,
Machine:
IntelCore 2 Duo P8600 @ 2.4
4.0GB ddr2
Quanta motherboard
Intel PM45 Chipset
ich9 m sbridge
OS Win 7 64bit
GPU nVidia FG 9300M gs
x1 hd (300gb) (x2 Partitioned os 50gb / data 250gb)
What I’ve done,
Windows fully updated,
All drivers...