The nightmare for Gamers:Heating problem in PC's

There is a very popular or well known problem in notebook PC's and it is also very popular among desktop users guess what u r right,I am talking about the heating problem.Heat buildup can cause problems for any computer. Generally, when temperatures inside the case rise above 35 degrees Celsius (95 degrees Fahrenheit), the risk of damaging important internal components increases greatly. The most common cause of overheating is the accumulation of dust inside the computer. The electrical components in a computer generate heat and fans inside the computer help move the air to keep the components cooled to normal operating temperatures. Inadequate cooling can cause excess heat to build up inside the case which can damage components.The sound of the fan running all the time may indicate that the computer is not running as efficiently as possible and that there is a problem with accumulated dust clogging the air vents.
  
Symptoms of heat issues and causes of excessive heat

Computer running slowly

 Make sure your computer has at least 500MB of free hard drive space. If your computer has less than 500MB free, it may cause the computer to operate more slowly. Try regaining hard drive space.
    Run Microsoft Scandisk and Defrag on the computer. Additional information and help with these commands can be found on the scandisk page and the defrag page on the microsoft website.
    Close any programs that are running in the background or disable background programs from automatically loading each time your computer boots. Information about doing this can be found in document CHTSR.
    Click Start, Search, and click For Files or Folders. In the search window, search for files named *.tmp and make sure you are searching or looking in the local C: drive.  Once search has completed, delete any files found.
    Ensure that no errors or conflicts exist in the Device Manager.
    Make sure Windows XP is up-to-date by checking Microsoft Windows update page.
    Delete all files in your Windows Prefetch directory. These files can lower overall system resources if loading programs no longer being used. See the prefetch definition for additional information about prefetch.
    Verify your computer has the latest drivers for the hardware devices installed in your computer.
    If your computer has a virus protection program installed, make sure it is up to date and that no viruses are being detected. If your computer does not have a virus protection program, you may want to consider installing a program to make sure no viruses are causing your problems.
    If your computer has worked fine in the past but recently has been experiencing this issue, run the System Restore option to restore the computer to an earlier date.