One of the things that can cause this is overheating. Open your case and see if there is an accumulation of dust inside, especially around the heat sink and fan assembly on the CPU. If there is you will need to blow it out with a can of inert air, you can find this at stores like Staples or Radio Shack. Be sure that you clean inside the heat sink fins, accumulations of dust will decrease the ability of the heat sink to work. Check see that your fans are all working, if you have a dedicated graphic card with a heat sink and fan, make sure that it is clean as well. Another area to check is the vent in the front of the case where air is drawn inside the case. You may need to remove the front cover to access the perforated portion of the case that the air flows through.
Before you put your hands inside the case please read the following information.Caution:
There are electronics inside the case that are very susceptible to electrostatic discharges. To protect your computer, touch the metal of the case to discharge yourself of any charges your body may have stored before touching any of the components inside. As a safety precaution you should unplug the computer to avoid electrical shock.
Edited by dc3, 06 July 2008 - 01:00 AM.