You know, I didn't actually check for sure -- I assumed it did.
On the desktop, I had a pop up informing me that Windows was not genuine. It had a button to click to solve the issue. As soon as I clicked the button, a pop up from MSE appeared informing me of the same thing -- Windows is not genuine. From the first pop up, it took me to a Microsoft site that stated up front that i would have to download a file to check validity. I downloaded the file, ran the .exe file and in about 10 seconds, I had confirmation that Windows was genuine.
In MSE, however, the pop up still stated that Windows was not genuine. There was a button to take me to the same Microsoft site and a link under the button for people who have already downloaded and have run the validity checker. I clicked the link, and a few seconds later, MSE reported that Windows was genuine.