Computer shuts off

Computer powers down and restarts by itself. Sometimes it
powers up to Windows Password. Lately it powers up and
runs disk check before opening Windows

Not very detailed...
Go in Control Panel-System.
Click on the "Advanced" tab.
Make sure "Automatically restart" is not checked.

I'm assuming that by "powers down and restarts by itself" you actually
mean "reboots" and not it actually turns off completely and starts up
again (Excluding notebooks/laptops, for which it is essentially the same
thing in some cases.).

Toby wrote:

Computer powers down and restarts by itself. Sometimes it
powers up to Windows Password. Lately it powers up and
runs disk check before opening Windows

Could be you've got the Blaster worm!!
"Toby" wrote in message
...
Computer powers down and restarts by itself. Sometimes it
powers up to Windows Password. Lately it powers up and
runs disk check before opening Windows