How to restore Sony Vaio to factory settings without disk? [Closed]

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xpcman
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I'm trying to restore my Sony Vaio laptop to factory settings. I've been told that holding Alt+F10 during start up will work but it just continues to the log in screen. I've tried pressing F11 too but that just brings up a screen saying operating system not found. Any help would be great thanks.

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What's the model number?
10
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SVS131A12W
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On many Sony models, holding alt + F10 at boot will start the factory restore process.
If that is not working then you might have a failed hard disk. The OS not found message is consistent with the failed hard disk diagnosis. You might need the help of a PC tech to replace the HD and re-install Windows.

Good Luck