Hi, I have no idea what I am doing, but this is my last hope. My son's laptop is stuck on a black screen that says: Service Tag : HVZRMT1 then Enter System Password then Please type in the system or administrator password and press <Enter>. Pressing F8, F2 or F12 does nothing. I have tried several options you suggest with no luck. My virus protection people say it is a motherboard lockout and it is a hardware not a software issue. Dell says it is a software issue (not covered) not a hardware issue (covered) and wants between $130 and $240 dollars to look at it. Any one have any ideas?