System Restarting Randomly - Happens in BIOS, seems faster when windows is running

Ok, I have a stock gateway desktop computer that I have not done any changes to - I use it for my work computer.
I came to work this morning, used the computer for 20 minutes and experienced a shutdown without any warning. Once it happened, the computer was stuck in a really short reboot cycle. It wouldnt even get to the BIOS screen. I decided to unplug the computer and clean out the inside as it was quite dusty. Once I brought the computer back it booted into windows. I went into the event viewer and tried to see if there was anything abnormal - nothing stood out. I did notice that the computer was no longer connecting via the network port - an integrated port on the motherboard. As I was going into the system hardware section to see if any of the hardware components were throwing errors, it restarted agian (All the hardware was showing fine). This time I was able to get to the "safe mode" loading area, so I decided to run the computer in safe mode and see if there was and changes. After a short period of time in safe mode - same restart. finally I thought I would see if the same thing is happening in the BIOS. I was able to load the BIOS and see the PC health section. I sat and watched the temperature of the CPU stay at 33 and the system temperature rise from 25C to 36C. During this time the computer restarted 2 times at around 32C and 36C. The computer seems to run for the longest time in this state, so I thought I would see if its an overheating issue. I started windows again, didnt run much for very long before a crash. Once it restarted I immediately went into the BIOS and saw a system temperature of 35C.

There are 2 strange things happening:
1. CPU temperature seems to stay at 33C - not sure if this is just staying cool, or something is not showing correctly.
2. The networking port appears to no longer be working after the first crash.

8 answers Last reply Best Answer
More about system restarting randomly bios faster windows running
  1. Check ram!
  2. 36C is not too hot for a CPU, but you obviously have a hardware issue. I would suspect the power supply first, but the symptoms could also be attributed to a failing motherboard. Take a look at the motherboard - are any of the capacitors bulging? Failed capacitors could cause some of the motherboard's components to fail (i.e. onboard NIC) and cause instability. How old is this computer?
  3. It didnt seem like it was running hot - but I know that can cause problems.
    It was also strange that the reboots seem to happen faster when I am running windows.
    I think I bought the computer around 2010 and it was a refurb.
    I can remove some ram and see if anything changes...
  4. That is the right age range to start having power supply or motherboard failures. When you are in the BIOS, does the PC Health section show system voltages? When in Windows, your computer can draw more power than it can when just sitting at the BIOS screen, so a failing power supply could be worse in Windows than in the BIOS.
  5. Yes, Voltages in the PC health screen are showing.
    They were all fairly close to the optimum, but none were exact.
    I would have to go back and see how far out they are to double check.
    I have removed all the RAM (6GB) and inserted 1x2GB stick.
    I am actually still running in that configuration now, without a restart.
    I have a temp program for the CPU and one core is 44C while the other is 28C.
    Waiting for a crash...
  6. Ok, so not long after I posted the last message the computer crashed/restarted.
    I would say that it ran the longest it has since this started happening today... but it was also sitting off for the longest too.
    I checked the voltages from the PC health.
    CPU - 1.264 1.1V - 1.12 3.3V - 3.376 5.0V - 5.026 12V - 12.032
    They arent far off, are they close enough or is this bad?
  7. I have reinstalled all the RAM and did a complete Windows Memory Diagnostic without any problems showing.
    I went to the windows event viewer to try and see if there is anything that might help... no luck.

    Anyone else have anything I can try?
  8. Best answer
    Do memtest86, if that doesn't fail most likely its your motherboard
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