What devices are attatched to your PC?
A device would include PCI, ISA, AGP Cards, Printers, Monitor, Hard Drives, CD Burners, Cameras etc.
Please include each of your devices in the list.
What type of Power Supply do you have? If there is no indication on the outside of your tower, you will need to open the case. Do not, I repeat, do not open the power supply. There is enough power in there to kill a person. I need to know how many Watts it carries. 230, 250, or 300 Watts.