I just built a new PC this afteroon and every so often - usually when installing new software, the system reboots! I have a gut feeling it could be the power supply; but I believe I have 400w in there. Any other ideas? Here's what Im running: AMD XP 2800 1 gig RAM (Kingston 400 DDR) Radeon 9800 Pro 128 MB Lite on DVD Lite on CD Two case fans 1 Neon case light could the case light be causing an issue? Heat maybe (the monitoring software says my system is running at 37 degrees)? Im confused. I'd greatly appreciate any insight.