Looks like a repeated crash of kernel on your system; do you see a blue screen?
If so, try this:
while booting...press F8 and boot your system in safemode and change the following setting.
Mycomputer - properties => Advanced tab => statup & recover - settings button => disable "automatically restart".
now your system will stop at blue screen giving the error message of the failure.
Now you can post the failure message here OR you can google that to know the resolution.