Sony PCG-XG28 Primary User Manual page 112

Insert the Sony System Recovery CD in the DVD-ROM drive.
Shut down your computer as described in "Shutting Down Your
Computer" on page 20.
Wait four seconds and turn on your computer.
Click OK to signify you have read and accept the Microsoft End-User
License Agreement.
When the System Recovery menu appears, follow the on-screen
instructions to complete the recovery process.
Press the power button and hold it for more than four seconds to turn
off the computer.
Turn on the computer. When the Sony logo is displayed, press the F2
key. The BIOS setup menu screen appears.
Press the arrow keys to select the Exit menu.
Press the arrow keys to select "Get Default Values" and then press the
Enter key. The message "Load default configuration now?" appears.
Check that "Yes" is selected, then press the Enter key.
Press the arrow keys to select "Exit" (Save Changes) and then press
the Enter key. The message "Save configuration changes and exit
now?" appears.
Check that "Yes" is selected, then press the Enter key. The computer
restarts from the Recovery CD.