Try restting the cmos and cables.
that worked for me once.

well. what you can do is try booting into SAFE mode.
If this is the pro edition it will come up with a dialog for the username just type administrator and leave the pw empty.
if this is the home...

all you need is a bootable windows disk...

WHat is the OS?

Are you playing a game when it restarts?


IT could be your power supply

When the screen to reboot comes up, go to
start-run and type CMD
on the black screen type "shutdown -a" and hit enter that will prevent from restat and will give you enough time to fic the...

Hey cloud, before the PC shutdown go to
start, run and type CMD
on the black screen type shutdown -a hit enter and you are good to go

Did you do a clean install or upgrade?

Yo malkit what you need to do before it shuts down is to go to..
start-run-and type CMD and hit enter
then on the black screen you have to type shutdown -a and then you are good to go...

when yo boot in safe mode just choose administrator user and will log you right IN, do not hit crt+alt+dlete

What you can do is boot in safe mode and create a new account and give your self administartor rights and then boot back on normal mode.
To boot in SAFE mode just tab on F8 key right after you turn...

just BOOT IN SAFE MODE and create a new user with admin rights

just boot in safe moe and craete a new user account with all rights