I have recently bought seven new computers for a lab at the place that i work at and they are all custom. These are the specs: MSI Geforce NX8500GT Video cards AMD Athalon 64 X2 Dual-Core Processor 2 Gigs Patriot DDR2 PC2-6400 Extreme Performance RAM Western Digital 160 GB Hard Drives 600W OCZ GameXstream PSU ASUS M2N-SLI Deluxe Montherboards they all run like a dream except when i install some games on all of them, during the install the computer will just randomly freeze up, mouse and all. now i'm well aware that sometimes you get bad eggs in hardware (ive already had to return a video card when it died 20 minutes into using it.) but when ALL of the computers have problems, it leads me to believe the problem is in the software. im baffled, because when a computer freezes, its usually a ram problem so i thought maybe video card drivers. so i tried reinstalling the video card driver from the disk as the one i installed on the model computer before i ghosted the drive was downloaded from the nvidia website. and that seemed to make things a LITTLE better but they still occasionally freeze up just when im installing things or multitasking big time. actually im lying, one of them hasn't frozen once. so could someone help me out here, i just dont know what could be causing every computer to freeze, the only thing i can think of is power supply but as you can see i have a very decent one and its 600 Watts so i doubt that. thanks in advance for any help.