I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
Thomas Jefferson
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It sounds like your graphics processor is failing. First thing that I would do is pull the whole thing apart, blow all the dust off of everything and then clean and re-apply thermal paste on the heat sinks for the cooler. Depending on the age of the computer, the processor and the configuration of the mother board there are a lot of different things that could be going wrong with it. Thermal paste is like $1 and available at best buy and most computer stores. I would start there and then when it is not thermally shutting down then you can move to software related issues.
Last edited by Danimal; 01-30-2014 at 16:31.
That was going to be my next suggestion, but if the mother board and PSU are a dust plug that wont last long either. I find that with 99% of the machines that I work on, getting proper cooling and thermal seating on the CPU and GPU makes all the difference for reliable operation and most of them have never been cleaned out ever. Then from there if the issues have not resolved themselves I look at hard drive issues because somehow they affect everything else no matter how unrelated they seem. Then as a final solution or to gain performance that the machine never had I turn to hardware. Start with a clean cool motherboard/CPU/GPU/PSU and any other problems will become easier to find.
Do you plug your monitor in the back of the computer near where all the USB ports and such are? Or do you plug it in below that in a more isolated area? Integrated meaning its built into the motherboard. If it's PCI(e), it'll be in one of the expansion slots below the other plugins. I'll post a picture of the back of mine in a sec to help explain further.