my Windows Xp is shutting down

[shakeh]

Hello dear members.,
My WIndows XP is shutting down every time when it wants to start,
Yesterday it was fine,I was working with Corel draw ,I save my work ,THEN MY computer began to not responding,I reboot it and this problem occured and I can't use it  till know because the computer shuts down,please can you helpme please?

[KingPincer]

You mean your computer just restarts before it gets to the windows loading screen?

[shakeh]

Yes ,yes it shutdowns and  restarts over and over !

[reddevilggg]

Have you tried Safe Mode and Last Known Good Configuration

Press F8 (repeatedly) when the PC is Booting up For Safe Mode and select Last Known.......etc.

[shakeh]

Yes I try the both options but didn't help/

[KingPincer]

Try changing the power supply and see if this will work.