Computer restarts on it's own.

Today my computer has started rebooting on it's own. The first time it happened earlier this evening I thought it was a isolated incident. However It happened two more times since then. I am currently in safe mode trying to see if it happens in this mode to it interrupted a AVG scan I was doing. So now I have to do it again and I don't know how to work it's command line scanner. In either case I disabled the "Automatic restart in the hopes of getting a BSOD next time but they don't seem to occur. I'm praying it's only malware. Is there any programs out their that allow me to do a good test of hard components because I have no money and no spare components for my system.

 

Random shutdowns are usually due to heat, bad Power Supply Unit, or bad RAM. I would clean out the heatsinks and fans (ask if you are not sure how), and then when you restart it, make sure all your fans are spinning.

Test your RAM: http://majorgeeks.com/Memtest86_d4226.html

Check your temperatures. There are several programs for monitoring temps, here are a couple: Core Temp http://majorgeeks.com/Core_Temp_d5665.html

Everest (also has other good stuff) http://majorgeeks.com/download4181.html

Also, can you list the specs of your computer? Operating System, desktop or laptop, type of CPU, RAM, PSU...?

E

 

The random reboots have stopped she's been up for about 24 hours now and not one reboot. I merely did some AV scans and updated my OS with the fixes available. However I plan to look at those program links especially the one that monitors temp. I made a HiJackThis log in case it was requested later on but it doesn't look like it was needed now. AVG found nothing but 1 false positive and a bunch of minor threats. I don't know.