Just put together a new system. Asus A8N-SLI Delux, CPU AMD 64 3500+ 939, ATI AIW X600pro, Corsair D400 TWINX 3200C2 (1Gig). After install, any time windows media palyer started, computer reboots. Same problem when going to MS update site. Found with memetest one faulty memory module. Removed it . Same problem continues. Any suggestions

Are the RAM modules compatibe? Have you checked their settings in the BIOS? Clock speed, RAS, CAS latency?
Also, is the CPU overheating? Are there any loose connections?
Have you run a virus scan?

Just a few things you may want to check...

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