If the manufacturer's recovery partition has been removed:
You can borrow and use a Microsoft Vista DVD (Retail or OEM System Builders License) , that contains the files for the various Vista Editions (Home Basic, Home Premium, Business and Ultimate) to be installed. The Product Key on your Computer / Laptop case determines which Edition is installed.
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.
Other Manufacturers' Recovery DVDs are not to be used for the above purpose.
And you need to know the "bit" version for Vista, as 32bit and 64bit Editions come on different DVDs.
To access Boot Menu:
https://neosmart.net/wiki/boot-usb-drive/
Here is how to do a clean install of Vista, using a Microsoft Vista DVD:
"How to Do a Clean Install and Setup with a Full Version of Vista"
http://www.vistax64.com/tutorials/117366-clean-install-full-version-vista.html
And once the Operating System is installed, go to your Computer Manufacturer's website and obtain the latest Drivers for your particular Model Computer or Laptop.
How to activate Windows Vista
https://support.microsoft.com/en-us/help/940315/how-to-activate-windows-vista
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If you have to use phone activation:
"How to Activate Vista Normally and by Phone Activation"
http://www.vistax64.com/tutorials/84488-activate-vista-phone.html
Microsoft is the one who says yay or nay for Activation.
You have to go through them, but lately a lot of posters have been referred back to here by them when using phone activation.
If that happens use this method of contacting Microsoft:
Contact support