My compaq desktop is not starting up and it keep on restarting whenever it is starting up

Suggest there are one or more Electrolytic Capacitors that have gone bad on your motherboard. Specifically the ones for the Processor. These are Voltage Regulators for the Processor.

To explain further;

https://www.youtube.com/watch?v=KN6_-8fYHo0

Replace the motherboard. This is one example of where you can purchase a motherboard.
NOT advertising for the website nor seller,


HP 434346 001 410506 003 DX2200 Motherboard 3 06 Ghz P4 TESTED Free...


This is a direct link to the Service Reference Guide from HP Support,

http://h10032.www1.hp.com/ctg/Manual/c00631987


(The above is a PDF file. You have Adobe Reader on your computer which uses PDF files.After you click it may take a few seconds for the PDF file to appear)

Power unplugged from computer open the computer case, (Page 44)
FOLLOW Anti-static precautions, (Page 36)

Replacing the motherboard, Page 66.

Please post any questions regarding this solution in a Comment.

Regards,
joecoolvette

RE-WIRE THE ELECTRICS CHECK SO ALL WIRES ARE IN THE
RIGHT PLACE.

Something is causing your Windows Explorer not to load properly. or it is motherboard problem. It is important that buy from desktop or system from reliable place.

I know it happened to me in puerto rico. here why it happend too much of light drops in ur area. u should remove ur motherboard go to CompuUsa or i think Best Buy sell them and buy another motherboard replace it (make sure its the same form and size as the old motherboard) and wa la!!