Hi,
Here are the Key/s to press at Boot to start the Recovery Process back to Factory Settings (new condition).
Sony Vaio – Tap F10 until the Edit Boot Options screen is displayed
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Or you can also borrow the exact same Retail Windows 7 Edition DVD and use your Product Key to reinstall.
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Or you can use this for preinstalled or Retail Licenses
Download the correct ISO file and make your own disk and use the Product Key that is on the COA Sticker.
https://www.heidoc.net/joomla/technology-science/microsoft/67-microsoft-windows-iso-download-tool
And here are instructions on how to burn ISO images to disk:
http://www.snapfiles.com/get/ISORecorder.html
Then do a clean install:
http://www.sevenforums.com/tutorials/1649-clean-install-windows-7-a.html
The COA sticker, which has the Product Key on it, is either on the underside of the Laptop or in the Battery Compartment.
With a Desktop it is either on the side, rear or top of the Computer Case.
Using the downloaded ISO file Method may require phone Activation.
If it does require phone Activation, do not follow the Auto Prompts, but hold on for a real person to explain to as to what has been done for re-installation purposes
"How to Activate Windows 7 by Phone"
http://www.sevenforums.com/tutorials/18715-activate-windows-7-phone.html
The above method also will require you to go to your Computer Manufacturer's website > Support and Downloads Section > locate your Model Number and Operating System > then download and install the latest Drivers for it.
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Using the USB method in conjunction with the above Windows 7 download:
http://www.sevenforums.com/tutorials/2432-usb-windows-7-installation-key-drive-create.html
"How to Get and Use the Windows 7 USB/DVD Download Tool"
http://www.sevenforums.com/tutorials/31541-windows-7-usb-dvd-download-tool.html
Cheers.
