How to restore Sony Vaio to factory settings without disk?

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wtng2010 Posts 2 Registration date Monday August 25, 2014 Status Member Last seen August 25, 2014 - Aug 25, 2014 at 03:19 PM
xpcman Posts 19530 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 - Aug 25, 2014 at 04:19 PM
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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xpcman Posts 19530 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 1,825
Aug 25, 2014 at 03:49 PM
What's the model number?