Take the 2-minute tour ×  I have a 2 year old Dell D520. In the
last 2 months it is randomly restarting. After hours of calls
with Dell support, they claim this is a software issue. Their
hardware diagnostics tool marked all hardware components as
"good". I also replaced the memory sticks on the box. I
installed a clean OS multiple times (Win 7, Win XP, Ubuntu) and
the problem persists. I have one image that was created with a
vanilla XP and the recommended Dell drivers. That seemed to work
for a short while but had the same issue eventually. Going back
to this initial image didn't help. My main suspicion is heat
related failure. But I'm not sure this is it.  Any suggestions
for more diagnostics? Any suggestions to address the heating
issue?  share|improve this question  2 Answers 2  Tools for
detecting heat problems:  GPU-Z will tell you the temperature of
the video card SpeedFan for the CPU and the hard disk Active@
Hard Disk Monitor for the hard disk (in addition to SpeedFan)
share|improve this answer  If