Sony PCG-K415B User Manual page 23

6 Select Password when Power ON under Security.
Press Enter, use M or m to select Enabled, and then press Enter.
Use < or , to select Exit and then Exit (Save Changes); and press Enter.
7
On the Save configuration changes and exit setup? screen, confirm that OK is selected and then press Enter.
PCG-K series
To add the password, proceed as follows:
1 Turn on your computer.
2 Press F2 when the VAIO logo appears.
The BIOS setup screen appears.
3 Use < or , to select Security to display another screen, select Set Machine Password, and then press Enter.
4 On the password entry screen, enter the password twice and press Enter.
The password should be up to 7 alphanumeric characters long.
The following is to configure your computer to prompt password entry when you turn on your computer or display the BIOS setup screen.
5 Select Password When Power ON under Security.
Press the space bar to change the setting from Disabled to Enabled.
Use < or , to select Exit and then Exit (Save Changes); and press Enter.
6
On the Setup Confirmation screen, confirm that Yes is selected and then press Enter.
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Using your VAIO computer