I bought an Windows Anytime Upgrade key from Microsoft's official online store sometime early 2011. The key was to upgrade from Windows Home, that came with the computer, to Windows Ultimate. This happen before the SP1 was released.
I'm downloading ISO Windows 7 Ultimate with SP1 from Windows official online retail store. The download link is suppose to be the official ISO. I'll verify it before using it. Once it's finished, I want to use it to do a fresh install of Windows. I want to know if I could use the Ultimate (Anytime Upgrade) key to activate it during the install -- without calling MS support.
I am pretty sure that mix-matching keys wasn't possible with older version of Windows. However, I want to know if it's possible with Windows 7. This question is important to me because of my location. I work from Afghanistan using a slow internet connection. Average download speeds are 18-25KB/s. With Windows 7 SP1 over 3 gigs, it will take about 2 days to finish install. I want to know if its a waste of time.