This problem may occur because a specific system setting is removed when a program runs with administrative credentials. The removal of this system setting may cause a BIOS validation check to fail. The BIOS validation check is part of the system activation process. Therefore, you may be prompted to activate Windows Vista, even though the system did not previously require activation. For example, this problem is known to occur when you use Intuit QuickBooks 2007. However, this problem may also infrequently occur when you install other programs or device drivers.
Windows Vista activation is stored in the BIOS region on Fujitsu LifeBook OEM Windows Vista systems. This BIOS region is not preset on our replacement system boards (it needs to be programmed). Once the system board is replaced, Windows Vista will search for that region on the system board, and if it detects a change the End-User will be prompted to reactivate.
To resolve this problem if it has already occurred, use one of the following methods:
• If you have been prompted to activate Windows Vista, and you have not used the product key to manually activate Windows Vista, install update 931573 by running Windows Update or clicking direct link below.
• If you have been prompted to activate Windows Vista, and you have used the product key to manually activate Windows Vista, install update 931573 by running Windows Update or clicking direct link below and activate Windows Vista by telephone.
Note: If Windows Vista was preinstalled by an OEM, the product key appears on a sticker on the case of the computer.
Click below for a direct link to the Microsoft Article on this issue that provides a direct download of KB931573. http://support.microsoft.com/kb/931573/en-us
How to activate Windows Vista if system was activated by a Volume License or OEM installation
