It doesn't sound like a hardware problem. It sounds like something in the
software. Try to find a registry fixer software ie. "registry mechanic".
You probably have a bunch of invalid entries, and removing them may help.
Pensacola Computer Guys
http://www.pensacolacomputerguys.com
"ROBERT BATES" <> wrote in message
news:XmN5h.1858$%U.1849@trndny07...
>I have a dell dimension 4300 computer. I installed the Full version of
>Windows X. (Not the upgrade version.) The computer is five years old.
>
> The problem is that the computer will automatically restart after
> 'Shutdown' is chosen in the Shutdown box. I have tested the hard drive,
> power supply, bios, and motherboard. Nothing seems to jump out.
>
> Is there a problem with the BIOS or does it need a new switch.
>
>