From: "Rich Gauszka" 

It appears some with ASUS mbs and the SIL 3114 raid chip have experienced
another feature of Vista - constant deactivation - and have quickly gone
through their MSDN 10 licenses

from the Microsoft.public.windows.vista.general group

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Subject: Windows keeps deactivating

And I have SIL 3114 on-board raid chip (ASUS m/b)!

I thought I installed the latest dirver.

Guys please let me know if you will find proper fix for this problem - I
have run out of my keys now! And it says - Windows is not genuine on my
desktop.

I had 10 keys from MSDN subscription. I tried to open incident for this but
stuck in the middle - one department reffers me to another. And it goes in
circles :-
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Subject - Vista activation lost after every restart

That is the issue, you more than likely need an updated driver from Silicon
Image.  There was an issue with the SIL 3114 driver that caused the disk
serial number to be reported as different each boot which could cause your
issue.  An updated driver should be available to address this issue. Do you
have a case number where it was told to you that the processor was the
problem?

--- BBBS/NT v4.01 Flag-5