Sony PCG-R505ELP VAIO User Guide (primary manual) User Manual page 108

My computer starts, but the message "Operating system not found" appears, and Windows does not start.

If you have connected a docking station with a floppy disk drive or an external floppy disk drive, make sure there is
no floppy disk in the floppy disk drive (non-bootable).

If a non-bootable floppy disk is in the drive, proceed as follows:
1.
Shut down the computer, then remove the floppy disk.
2. Restart the computer and confirm that Windows starts properly.
 If Windows still does not start, follow these steps to initialize the BIOS:
1. Remove any floppy disk from the floppy disk drive.
2.
Shut down the computer.
3.
Remove any peripheral devices connected to the computer.
4.
Turn on the computer.
5.
Press the F2 key when the Sony logo appears. The BIOS setup menu window appears.
6.
Press the directional arrow keys to select the Exit menu.
7. Press the arrow keys to select Get Default Values, then press the Enter key. The message "Load default
values for all SETUP items" appears.
8.
Press the Enter key, and select Yes.
9. Use the directional arrow keys to select Exit (Save Changes), then press the Enter key. The message
"Save configuration changes and exit now?" appears.
10. Select Yes, then press the Enter key. The computer restarts.
If your computer continues to display the message "Operating system not found," and Windows does not start, use your
supplied System Recovery CD to restore the software titles shipped with your computer. See
CD(s) for more information.
The System Recovery CD restores your computer to its original state, so user data and applications will be lost.
Using the System Recovery
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