hardware as possible causes.
did u tried running it in the cold with a regular atx psu?
what i would do next is reconfirm that it'll never crash in safe mode, so run it at safe mode multiple times when its cold. IF this is not crashing, then its definitely a software issue. Which means i would reinstall windows, using a clean copy, don't do HD cloning, sometimes it causes problems. DO NOT install anything, and run it for a few times, in the cold and see if it'll crash. Then iteratively add software and driver in. It's a slow approach, but its good at identifying your problem.
Other than that, the only hardware cause that i could think of that'll cause ur system to crash is:
1) motherboard temp limit, which is strange, because if its colder than operating temperature the motherboard wouldn't start in the first place (hence its probably not ur motherboard)
2) Ram: if you're using some cheapo ram, might wanna switch with a different set, see if that makes a difference.
3) HD: i dont think its the hard drive.
do you have any unsigned drivers? seems like this might be your issue if it's not locking up in "safe mode".
I ran another test today on my way to work and this time I ran in safe mode with network support. The result is that it locked up with in 5 minutes. I will try removing all network drivers to see if that helps.
I'm still wondering why it only locks up when its cold if its a software issue. I guess it can be a combination of the hardware and software.
I think I found the problem. Since my last test with safe mode network support locked up the PC I decided to remove my Orinoco gold b/g pcmcia card on my way home from work. This is the first time I have listened to my MP3's all the home since it started to get colder. I will have to do some more testing to make sure it was the card locking up the PC.
The strange thing is that I had it removed when I removed all the USB devices and it still locked up. Or at least I think I removed it.
My Orinoco gold b/g card was demoted to the car PC when my cheap generic USB wireless adapter I had for the car gave out. This Orinoco card suffered a hard hit and bent the end of it quite a bit a while back before I put it in the car. It still works fine and had no troubles with it until now. Maybe it has a small crack in a trace or something. Maybe when its cold the crack gets bigger? I don't know. I'm going to demote it back to my old laptop.
I bought a USB wireless adapter from newegg.com as a replacement. Hopefully this adapter will work better. http://www.newegg.com/Product/Produc...82E16833166022 Not bad for the price and it has an external antenna.
Okay, you never mentioned you had a PCI card. A PCI card has a greater potential for vibration issues than other connections. See how it works without the card.
Well a few days of driving around without my Orinoco PCMCIA card inserted the computer has not lock up.
Now I'm just waiting on my USB WiFi adapter to come in to see if the PC will still work with it installed.
Quick update. It was about 10F outside on my way home tonight and the PC still ran fine.
Computer is still running fine. The new USB b/g adapter is also working great. I get much better signal strength since it has that small 2db external antenna. Since my PC has been running fine I'm now able to continue my data logging from my CAN-View.