After I restarted my laptop it booted to a grey screen with the cursor and no further. Did a start up repair and it failed. I could boot it up in safe mode. Tried do do a restore but all the restore points were gone. I know there where at least 6 restore points previous. I was just about to do a system recovery back to factory default. I remembered a cheap trick. I unplugged the cord, took out the battery and hold the power button down for about 20 seconds. Put it back together. It rebooted. Desk top came up. Couldn't believe it. Everything appears to be working except the touch pad no longer functions. Did a manual restore point and it was successful. Now I am afraid to restart again. I got a gut feeling I am still going to have to do a system recovery anyway. What do you think caused this in the first place?