Markkk wrote:
>
> I have had a continuing problem with my computer crashing after I turn it on
> in the morning. It usually crashes a couple of times in the first 15 minutes
> or so. I cleaned out the dust from inside the tower a few months ago, and
> that fixed it for a awhile. When it returned I cleaned out the remaining dust
> I had missed before, and it was OK for a few days. But the crashing came
> back. So I reloaded all my software and operating system, figuring a bad
> virus might have corrupted something on the disk. Well, it ran a couple days
> without crashing after that, but now the crashing is as bad as ever. It
> doesn’t seem to matter whether I scan for viruses or not. I’ve run
> Malwarebytes’ Anti-Malware and Semantic scans to no effect. Does anyone have
> any other ideas about how to fix this problem?
>
If the system calmly writes an error reason in the Event Viewer, it
might be software.
If you disable automatic restarts, such that an error results in a static
blue screen, does the system actually stop with a blue screen ? Or does it
just restart anyway, and ignore the automatic restart setting in Windows ?
If no error messages are left, and it appears to be an unstoppable hardware
crash and reboot, it could be
1) Bad power supply (the fact it stops after the system heats up,
makes this the most likely culprit). (I have a bad power supply here,
where the capacitors inside are leaking, and that caused instability
when the system was cold.)
2) Bad RAM.
The tests remain the same in any case.
1) memtest86+ from memtest.org . I run this for two complete passes,
booting from a memtest86+ CD or floppy. Since memtest is not a very
sensitive test, I then move on. If you do see errors, then by all
means, you have a problem. But if you don't see any errors in two
passes, then continue to the next test.
2) Prime95 from mersenne.org/freesoft . This is a multithreaded program,
which does a math calculation with a known answer. It can detect corruption
in memory or by the CPU. It also tends to draw a fair amount of power.
If you adjust the max memory tested, such that you leave 400MB for other
software, you can combine other tests.
3) I like to run something like one of the smaller 3DMark benchmarks, to help
crank up the video card heating. This one is a 40MB download. I can
run this while Prime95 runs in the background.
http://majorgeeks.com/3Dmark_d99.html
Now, if the system "falls over" or reboots, when doing (2) or (2)+(3),
then that would again, point to the power supply.
You should also listen carefully, when the system starts. Do any weird
noises come from the power supply when it is cold and you've just
turned it on ? That is what warned me I had a problem.
Paul