i don't know to explain this but here goes... my dell laptop keeps going to a black screen after it boots up everything is still running in the back(i can hear it) but i can't see it... the screen works fine; shows that windows is loading and then shows my desktop then before i can use it after its finished loading it goes Black.

i don't know if this makes a difference but before this happened i was clicking on the "Fn" key(light purple key) b/c i was trying to turn off the scroll lock but i may have clicked something to do this. CAN ANYONE PLEASE PLEASE HELP ME