I installed Windows XP SP2 Professional and decided to go back to Vista Ultimate. I did and unlike any other time I started getting Physical Dump Errors (BSOD) and then needing a restart, the weird thing is when I would play a game or use the PC it would not do this, just in idle. I even went as far as to install Windows Vista Home Premium, to no avail it still did it, so I used this other guide to change my 'maximum' and 'recommended' ram usage through Vista's tools. It helped a lot but I still get them once in awhile. I also noticed that my RAM will sometimes go upto 80% usage making my PC almost unusable until a reboot, could my RAM be messed up? or is it just Vista? Windows Vista Home Premium 2GB DDR2-667 Visiontek HD3850 256MB PCI-e 16x MSI K9VGM-V Motherboard Antec SU380 Power Supply AMD X2 AM2 3800+ CPU On a side note: my CPU on average is Core1 -9% usage, Core2 -43% usage, RAM - 30% usage, this is with 5 programs running. hmm..