download hiren's boot cd assuming it windows since it's an acer laptop or google bootable winnt pass reset... you should find something... basically you will boot into a linux environment and reset the password then reboot and voila you win
i must be the only person on these forums that finds it suspicious when someone's first ever post is a thread-starter regarding circumventing a password on a laptop!
@op: use a password recovery cd. or try to guess it from the secret question or something. or reinstall windows after backing up the data on the windows drive.
people, do not promote password bypassing/cracking.