Why does the computer restart every once in a while

Q: My Computer is P4 1.5GHz, I installed the Windows XP operating system, but every 2 hours in the course of use, my computer will restart, excuse me, what is going on?

A: First of all, you can use the new version of anti-virus software to check if there is no Trojan, virus program, in addition, the computer cooling is not good caused by excessive temperature. You can clean the radiator and reinstall it carefully to ensure good contact. If there is no improvement it can be replaced with a larger power fan for cooling. In addition, the replacement method can be used to find the components that cause the failure is generally CPU, graphics, power supply, which power supply voltage adaptability and power to the stability of the impact is very large.