lAPTOP

IM REBOOTING A COMPAQ LAPTOP WITH MY DELL LAPTOP REBOOTING SYTEM BUT AFTER IT FINISHED REBOOTING IT ASKED ME FOR ADMINISTRATOR PASSWORD WHICH I NEVER HAD. IM NOT SURE WHERE TO GO FROM HERE.
IM REBOOTING IT LIKE THAT BECAUSE IT WAS HANDED DOWN TO ME AND WHEN I WOULD BE DOING MY HOMEWORK THERE WAS THIS NOISE LIKE A COMMERCIAL COMING FROM THE COMPUTER WITH NO OTHER PROGRAM RUNNING AND MUSIC WOULD PLAY AS WELL.