Acer hdd primary master hdd password

Hello and welcome to Tom's Hardware Forums.

Our Rules here say we can't help you in case we inadvertently help someone hack into another person's computer system. If you want the BIOS password, ask Acer who will ask for proof of ownership before providing it. System passwords are set by the user to protect their data and you need to format the drive and reinstall Windows to overarch that password, those wiping those data out completely.