|Did you install any software recently?|
Did you unplug any USB drive using an incorrect way, recently?
Did you turn off your laptop by simply pressing the on/off button and without pressing the switch off button?
Try to start your windows in safe mode (press F8 continously as soon as you turn on your pc)
if it works and you manage to restart your laptop from there it is probable that your issue has to do with a software ar a process which doesnt go off properly.
WebMaster of Web Talk