Received a Dell computer from a friend who cant access into his computer because he forgot his admin Windows 10 Pro password. Password also controls bios bootup sequence. How can I help him to regain access into his computer. If I remove the cmos battery from the motherboard, will that erase the admin password? BIOS sequence is now set as 1. Diskette drive, 2. HDD, 3. USB storage device, 4. CD/DVD RW drive.