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What should I do if the message "Operating system not found" appears when my
computer starts, and why won't Windows start?
Make sure the computer does not have a "non-bootable" CD or DVD in the optical disc drive (if applicable).
If a non-bootable media is in the drive:
1
Remove the media.
2
Restart the computer and confirm that the Microsoft Windows operating system starts properly.
If the Windows operating system still does not start, follow these steps to initialize the BIOS:
1
If there is a CD or DVD in the optical disc drive, remove it.
2
Turn off the computer.
3
Remove any peripheral devices connected to the computer.
4
Restart the computer.
5
Press the F2 key when the VAIO logo appears.
The BIOS setup screen appears.
,
6
Press the
key to select the Exit menu.
m
7
Press the
key to select Load Optimal Defaults.
8
Press the Enter key.
The Load Defaults? window appears.
9
Press the Y key on the keyboard and press the Enter key.
10 Select Exit Save Changes and press the Enter key.
The Exit Saving Changes? window appears.
11 Press the Y key on the keyboard.
The computer restarts.
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Troubleshooting
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