Hi All, First lets get the PC specs out of the way: Windows XP Home SP2 fully updated M2N32 WS PRO AMD Athlon 5200 64 X2 Dual Core Socket AM2 2GB 800MHz DDR2 Corsair Nvidia 7950GX2 1GB PSU: 650 Watt Power Supply (Antec TruePower Trio, Model: TP3-650) DC Output +5v +3.3v + 12v +12v +12v -12v +5vsb Max 24amp 24amp 19amp 19amp 19A 0.8amp 3.0amp Min 0.3amp 0.5amp 1amp 1amp 1amp 0amp 0amp Total 650W 2 x HDD 1 = SATA 250GB & 1 = IDE 200GB 3 x DVD RW 2 SATA 1 IDE 9 in 1 Memory card slot Since purchasing the 2 SATA dvd drive,well a few days afterward things started crashing and Windows took an age to bootup, so I figured Windows must be corrupted or the HDD it was installed on (in this case the old IDE drive) had become knackered. I reinstalled Windows on the same drive at first, but again within an hour or so it started doing the same thing so I AGAIN reinstalled it but on the SATA drive. Everything was fine for about a week until this weekend when the same symptoms came back!!!! I've also tried swapping the memory still with the same results. Is it likely to be that the PSU is not capable of handling so much hardware or could the mobo be on it's way out?? The reason I think PSU is that I have unplugged both the new SATA DVD drives and it seems to be working at present. Any help would be most appreciated. Thanks.