The Basic Input Output System (BIOS) is the first code run by your Acer Aspire at start-up in order to launch the hardware and software applications. If your BIOS is locked you can open it through the "F2" key. You won't be able to access your Acer Aspire if your BIOS is locked. If you have forgotten your BIOS password, you can try several default passwords to reset it.
Press and hold the "Power" button on your Acer Aspire to turn it on.
Press the "F2" button when you see "Press
Type in your BIOS password when prompted or type "CMOS," "BIOS" or "PHOENIX" if you've forgotten it. These correspond to specific models, depending on your Acer Aspire model year and allow you to reset your BIOS password if you need to.