How long since you refreshed the heatsink compound and did this (watch the video at ) http://reviews.cnet.com/4520-11319_7-6240575-1.html
I have a Asus Pundit-R barebones system. It has a Intel P4 chip with HT technology. The systems runs fast and smooth. I can give further specs if needed on the system to help you ascertain why I'm getting a blue screen. But I'm running Vista Ultimate on a system that was definitely not originally designed for it but runs it quite well. All except the blue screen issue I get about once every two or three days. I never lose data but fear I could eventually but either way I would like it fixed. That being said some facts on the blue screen are as listed from the Windows Solution that pops up after the unexpected shut down and restart.
Problem event name - BlueScreen
OS Version - 6.0.6001.2.1.0.256.1
Locale ID - 1033
BCCode - a
BCP1 - 000000D8
BCP2 - 00000002
BCP3 - 00000001
BCP4 - 81BADFF9
OS Version - 6_0_6001
Service Pack - 1_0
Product - 256_1
Files that help describe the problem
Hopefully this information helps. If you need further hardware information since the blue screen says something about a hardware failure before it boots down I can give it to you. I have considered just installing XP instead of Vista. It is obviously more stable, but I have two laptops that run Vista and thought it might be easier to sync them up and swap files and so forth over the network this way. Thanks for any and all suggestions. Like I said if you look at this and just think I need to go to XP thats ok, just was wondering if theres something I can correct first without going that route. Thanks.