Ok well.. for the past few days my computer has been shutting itself off at random. Around a month or so ago, I had half of my program files deleted, Starting exactly with internet explorer.. Strangely all the program files returned except Internet Explorer.. well I had tried to install IE over and over, with no luck.. Then recently, about say a week or two ago, I tried again and got IE to finally install.. now I'm having trouble with my computer randomly shutting off.. I checked my CPU Temp and it said 86C when I started the thing up. I keep my computer running 24/7 pretty much.. and I don't know if it's the fans, if it's because I'm keeping my computer on all night and day, or what it is. I need help though, I have no money to afford a new Power Supply, a new Fan, or any sort of new cooling unit.. Is there anything I can possibly do to fix this? Oh and when my computer resets itself, when it returns it says 'Windows has recovered from a serious error' I check the files involved in this error, and it's some sysdata.xml file along with some other file, in my Documents and Settings --> User --> Local Settings --> Temp folder.. So I'm not sure if that has anything to do with it. I Know for a fact that 86C is way too high for a CPU to be running.. so I'm not sure. Thanks in advance to anyone who can possibly help me..

untick automatically restart on system failure

That's prob the problem your cpu temp. What I would suggest is that you clean out the whole inside of your system. Anything that has dust on it clean it off.

If you want to take it a step further go take off your heatsink clean off the old theraml pasting on both the cpu and heatsink and buy some new thermal cpu paste and apply a thin layer across the cpu.

In addition to the suggestions in #2 You MAY be able to move your Harddrive to get more air circulation. Check to verify ALL fans are working, there is a fan in the PSU too.

Well, it seems that the high temp isn't anything to do with the problem. I did some research and it seems the problem with restarting wasn't the CPU temp or faulty hardware at all. It was a new web cam's software conflicting with my on-board sound.. While I still think I need to get the temp down, I'm pretty sure I've fixed the problem for now. Thanks for all the suggestions and help guys.