PROBLEM:
=========
Unable to Activate on HyperV Virtual client

CAUSE:
==========
Used the Image of OEM Installed OS

RESOLUTION:
=============
Running a Repair Install with VLK OS CD.

More Information
==============
Warning The steps in the article are effective only on Volume License media. If you try these steps on OEM media or on retail media, you will not change the product key. When you install Windows XP or Windows Server 2003, the media must match the product key. That is, the channel (MSDN, retail, OEM, Volume License, and so on), the SKU (Windows XP Professional, Windows XP Home Edition, and so on), and the language (English, French, and so on) must match between the product key and the media. This is necessary so that you can successfully enter the product key. If the installation media does not match the product key, you receive the following error message: Product Key is invalid.