recently my laptop will try to shutdown, even restart but at the windows is shutting down bit it freezes at that and the hdd light 9the one that flickers when its working) is constantly on. i have to use the switch to turn it off. i had this prob before and fixed it with a system restore. a few days later it has come back. i dont want to do a system restore again. i dont think i have any crap on my pc but theres a chance of it i spose. any ideas?