you can go to Control Panel\All Control Panel Items\User Accounts, select remove password then enter the existing password.
if the webcam (or whatever you're refering to) is password locked, then you'll have to unlock it with the current password to be able to remove the existing psssword. you might also require to have administrator level access.
otherwise, don't ask for help on password removing/bypassing/cracking. it is against tomshardware's rules.http://www.tomshardware.com/forum/57950-35-read-first
if you're locked out of the laptop, check this link.http://www.tomshardware.com/forum/64241-35-locked-laptop