xp startup problem

[s4ch117]

hi

recently when i start my computer it would load into windows and then it would instantly freeze so that i couldn't actually do anything (not even click on the start menu) and then after a minute a blue screen would appear for a second and then it would restart itself. Now its got to the stage were i cant even get into windows and the pc gets stuck at the boot sequence stage. I was wondering if anyone knew what the problem would be and how to fix it. Any help is much appreciated.

Thank you

 

[s4ch117]

i tried to start up in safe mode but it wouldnt let me. I stops at the verfiying pool dmi stage on the boot sequence and the weird thing is that it stops at boot from cd. The hard drive is my first boot device.