Hi all. Here's hoping someone can help me with this. It is not the best system in the world but it still does everything I need it to. First, the stats: OS: XP pro M/B: Soyo SY-KT600 PLUS V.1.0 Ram: 512 x 2 PC3200 DDR ( matched ) H/D: 160gig Seagate ide HP dvd burner Vid card: Ati Radeon X700 pro 256mb memory Audio: Creative Sound Blaster Live Value Cooling: Thermaltake Smart & Silent Volcano 9 Logitech cordless mouse and keyboard etc .... I got a watercooling kit for Xmas, the Evercool WC-202 Ultra. All was working well before I installed the kit, now I can't boot into Windows even in safe mode. I have tried resetting the bios, swapped memory sticks, tried a different vid card, tried a different hard drive and tried the safe settings in the bios etc ... There were no leaks in the system, the flow is good in the cooler. The hardware monitor in the bios tells me that the on die temp is around 76 celsius but the sensor from the cooling kit tells me that the temp is hovering around 36 to 40 celsius. When I first saw the bios temp reading, I shut down and removed the cpu to check it out and there is no way that the temp reported from the hardware monitor was correct as I felt just a bit of warmth after the 3 or 4 minutes it took me to remove it. I have attempted to do a repair with the XP disk or to even format and reinstall but it gives me a BSOD almost immediately after copying the initial files. BSOD also in safe mode usually right at the mup.sys thingy. Here are some stop errors that I get: Stop: 0x0000007e ( 0xc0000005, 0x805a89e9, 0xf7505a28, 0xf7505724 ) Stop: 0x0000008e ( 0xc0000005, 0x80882ae5, 0xf7c79e3c, 0x00000000 ) Does anyone have any ideas ? I have a feeling that maybe it's something with the board ? Arrrrrrggggg !!!!