Will be validate Windows if previous owner used product key?

I need to run Windows XP on a new computer, I am building for games, so I searched eBay and found a seller of good reputation with a full detail of Windows XP Pro package. Assuming that the seller has retired the PC that were previously running this copy of Windows, I'll be able to install it on my new build? Or Microsoft will always record the product key is in use? If this is the case, what is my recourse? Can Microsoft help me validate the copy, because I'm having the certificate of authenticity and documents proving that I bought the software enough?

Thank you!

If the key is not used for a long period of time (say, 6 months or more) there is an activation lucky will not be a problem.  If she fails to activate (assuming that the key is no longer in use), then try to phone activation.

Please note that there are sellers on eBay who are not trustworthy and you take a risk, suggest that you only use PayPal to protect you.

How to activate Windows XP
http://support.Microsoft.com/kb/307890/en-us

See the section titled: "how to activate Windows XP by phone.
Also, make sure that you do not confuse the product key numbers and letters
(number 8 for the letter B, etc.)

Blank page to activate Windows in the wizard of Windows Product Activation
http://support.Microsoft.com/kb/314935

How to contact a Microsoft Product Activation Center:
http://support.Microsoft.com/default.aspx/KB/950929/en=us

Microsoft Activation centers worldwide telephone numbers:
http://www.Microsoft.com/licensing/existing-customers/activation-centers.aspx
(This site is for activating Volume License, but if you call, they will help you)

The phone number is not working:
Microsoft Wordwide contacts: http://www.microsoft.com/worldwide/default.aspx

Once Windows activated / Genuine Advantage Notifications:
http://www.Microsoft.com/downloads/en/details.aspx?displaylang=en&FamilyID=afd45b36-3d77-4259-801c-d31a9a90cdcf
(This tool will confirm that the copy of Windows installed on your PC is genuine and authorized)

J W Stuart: Http://www.pagestart.com

Tags: Windows

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