Can I re-use the product key of Windows 7 on my machine after downgrading?

Someone gave me a desktop computer with the original Windows 7 which has been downgraded to XP. I used it until the end of Windows XP support. My question is can I reuse the product key of Windows 7 on the machine and put Windows 7 on? Activation will fail and I would put Windows 7 for nothing?

It works perfectly, yes you can do it.  But to put Windows 7 on it, you will need to use either

(A) the original Windows 7 OEM disc provided with this computer

or

(B) recovery partition integrated guidelines of the manufacturer to restore the original Windows 7 OS

--

The reason is that the product key on the computer is linked to this kind of OEM (Original Equipment Manufacturer, like Dell or Acer).  If you cannot use any Windows 7 CD-ROM drive with this code. It must be the disk or installer that came with this code.

Tags: Windows

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    ==========================================================

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    ==========================================================

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    ------------------------

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