What the......? I recently built my first system. Admittedly I keep my computer on for many hours, sometimes up to 18 hours in a given day. Now this happened on my old system near the end before I built the new one. I chalked it up to a combination of overheating and being taxed beyond it's capabilities (not enoug RAM, processing power, or hard drive space to do what I wanted it to do). But now, this is happening up to 3 times a night on my new mega-computer and I'm getting very pissed off. Here's what I built: P4 1.8Ghz Abit TH7-R motherboard 1GB RIMM memory Pioneer 116 DVD-Rom drive Plextor 40/24/10 CDRW drive Creative Audigy Platinum sound card Visiontek 5564 Xstacy Personal Cinema video card Maxtor 60GB 7200RPM HDD Maxtor 20GB 5400RPM secondary HDD Creative Inspire 5300 5.1 speakers Anyway, I'm thinking overheating. I purposely left the sides off the case from day one to let heat escape. Now I only have 1 internal fan BUT I have a medium oscillating fan permanently planted in the back of the case always on high. I purchased 2 more internal fans but stupid me bought the wrong ones (I bought fans with power connectors and can't install them because there aren't any power connections free internally...DOH!!!). I did not install the heat checker thing on the motherboard because, with this being my first build, the diagram in the manual is horrible and I couldn't make heads or tails out of it. I'm running Win2k Pro SP2. I use Norton Personal Firewall 2001 (which has NAV bundled with it) and perform Live Update everyday. No viruses are ever found. I'm on a cable modem and occasionally get a Security Alert about the Sub Seven Trojan virus attempting to access my system. But AFAIK, NPF blocks it. I perform Windows Updates on a regular basis and have Critical Update Notification installed. If you guys need more information, just let me know here or e-mail me at [email protected] So my friends, what's the deal? I'm scratching my head on this one. Any suggestions, comments, or assistance in this matter is greatly appreciated. Thanks in advance.