Do you have any programs that monitor your computer temperatures? If not, try downloading Speedfan <http://www.almico.com/speedfan.php>
this is a cool little program that can be used to tell you the temperatures of your cpu, hdd's and rpm of fans etc... This also is a very advanced program, so do not muck around with the settings on it unless you know exactly what you are doing. Read the information on the webpage before downloading. If Speedfan reports that your system (or a component) is running too hot (shown by a little flame symbol), then you need to take action to fix this (ie. add more fans, change to more efficient fans etc...). Attached is a little picture of my speedfan program running currently. Notice that the CPU fan is the only one with an RPM, this is because other fans in my system are attached directly to the power supply and not through the motherboard. Thus the sensor cannot pick them up. And I'm not exactly sure what AUX is, or why its temp is heaps higher than the others, but it's still got a tick. I think my comp is running too cool, I'll have to put it to good use
If that's not the problem, what settings do you have for your computer to do when not in use? Open Start menu > Settings > Control Panel, and then open the Power Options icon. I've noticed that sometimes Windows XP decides not to respond too well to settings like "turn off hard disks" and "system standby". If you have any of these enabled, try disabling them and see what happens next time you leave your computer unattended for a while. In particular, if you have faulty memory these can stuff up. Happened to me the very first time I purchased a new computer. I didn't know what was going on, I had this problem and others too, just various errors here and there. Of course, the ram was replaced and everything's sweet now, but...
Edited by ruthandtroy, 14 May 2007 - 08:42 AM.