Seemingly random crashes/bsod

Hi all..

I have a problem thats been going on multiple months now, my computer will seemingly shut down at random, no log out screen or anything just BOOM powers off when running on battery OR plugged in, im running windows 7 ultimate 32 bit, and when the computer reboots or i push the power button again it boots up and 9 times out of 10 boots into a bsod, im able to do a system restore most times to fix it, hence how im typing this now, but im not sure what would be causing it nor how to fix it, i dunno what all info you need to help but ask and i shall post please help!!!

forgot to add, when i boot back up some times, again randomly it seems my sound card will be disabled, i can re enable it and it works fine but thats just something else that happens

Alright, Computer is 2 years old about, operating system was installed a couple weeks before it was released in stores by a microsoft partner i had working on my computer at the time, it is the full version as it was then updated later, Again its windows 7 ultimate 32 bit edition,

is their any more information i need to add?

help please??

uninstalled avg and it seemed to work a little, but while playing ddo earlier today it again randomly shut off, would it have anything to do with the computer getting really hot on a normal basis? it seems to heat up lots, as for the audio drivers i dont know what conexant is, but my audio drivers are all up to date

i have atheros and there weren't any updates avalable, i keep my computer propped up and i can hear the fan blowing fine, im in an air conditioned room ive blown the dust out of it already, it does happen after a period of time being on hence my questioning the heat issue thing, as for the temp monitoring, i'm not sure if there is a way to monitor it other then by saying yep... hot lol i did note it seems to do it when im playing games on it more often then not, tho its not one specific game