How I can Vaidate Microsoft Secutiry Essential on a Non Genuine Machine ?

I have a Laptop and a desktop. My Laptop came with pre-installed Windows 7 Ultimate x64. I have created a backup copy form that. Later I installed Windows 7 Ultimate on my Desktop using that back up DVD.

Now everything were fine until yesterday. I had working copies of Microsoft Security Essential on both machines. Today after I turned on my Machine I got a error reporting "Windows did not pass genuine Validation therefore MSE will be disabled after 30 Days. Seeing that I thought If I use ChewWGA it might solve the problem. As planned I have used that. But on the initial screen it showed it had failed to patch WGA so I used RemoveWAT but it removed the Genuine Logo too so I revert back to ChewWGA (Strangely this time it worked. At least now I can see the Genuine Logo under Computer Properties).

Now still my MSE giving popups stating I need to resolve the issue otherwise MSE will be Disabled. I know the best will be re-install but I have installed so many soft-wares and their configuration are so Complex I dont want to have all those troubles.