Sony VGN-Z790D - Manual (Page 114)

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Customizing Your VAIO Computer >
Setting the Password
Setting the Password
In addition to the Windows password, you can use BIOS functions to set two types of passwords to protect your computer:
the power-on password and the hard disk password.
The hard disk password is not available on models with two built-in solid state drives in RAID configuration.
See the specifications to find out about configuration of your computer.
Once you have set the power-on password, you will be prompted to enter the password after the VAIO logo appears to start
your computer. The power-on password allows you to protect your computer from unauthorized access.
The hard disk password provides additional security for the data stored on your built-in storage device. If you set the hard
disk password, other users will not be able to access the data without knowing the password, even if the password-protected
built-in storage device is removed from your computer and is installed in another computer.