Laptop restart unexpectedly...?

THIS IS BECAUSE UR INTEL GMA 3150 DRIVER UPDATE IS NOT PERFECTLY INSTALLED JUST GOTO DEVICE MANAGER IF U DONT KNOW WHERE IT IS JUST RIGHT CLICK ON MY COMPUTER AND SELECT PROPERTIES THERE U WILL EASILY FIND IT AND THAN CLICK ON DISPLAY DEVICE AND THAN CLICK ON PROPERTIES AND THAN SELECT ROLL BACK DRIVE RNOW IT WILL ASK U TO RESTART THAN IT WILL BE OKAY