I'm not really sure if this will help but:

Try going into the BIOS and under Security disable the Predesktop Menu.

Another good idea would be to remove the screw that holds in your hard drive tray, remove the hard drive, use some computer duster (or just blow) on the hard drive pins and in the hard drive port. Re-seat the hard drive and put the screw back in.

Re-seating the memory would be another good step. Unfortunately I think it is under the keyboard in that model. Remove the screws on the bottom of the laptop marked with the keyboard icon. The keyboard should then be loose and you can carefully remove it. A small flathead screwdriver helps. If you have more than one memory module try turning on the laptop with only one of them installed at a time to check for bad RAM.