when it starts looping. If this is windows 8, a damaged hiberfile can get it stuck in a loop and the only cold start up now is from the reset button.
I was using my HP, I guess I had it on for a whole day or more then it forze. It wasn't reacting other than the mouse, but being impatient I forced a shutdown by holding the power button, I've done it before with nor harm done. But now it wont start. It will come on with the HP screen saying "preparing repair" then "run diagnostic" still on that HP screen then it will go to a blue screen with a restart option or advanced option that includes turn off, troubleshooting-restart, other devices like repair disc, and one more I forget. It was at night when this happened so I didn't let the computer continue what I guess was a diagnostic, which was just the HP screen with the loading circle.