Laptop screen is frozen how do i unfreeze it

The microwave????????????

EDIT: Jokes apart.... How did you manage this feat..... I'm trying to OC my rig and need sub zero temps.... but can't get the nitorgen cooling things here....

Try ALT + CTRL + DEL

Keep power button pressed.
Then , clean your laptop with this tool
http://baltaru.com/downloads/clean-registry-clean-garba...
Good luck