Hi I had upgraded from an activated Windows 7 Ultimate to build 10130. Upgraded that all the way 10240. It reported activated. I was on the insider program. Few days back, it says I'm not activated and I had the key ended in 3V66T, which looks like a generic key on Google. So I just format and reinstalled hoping for the best, but I'm still not activated. Says the key is blocked? These are MSDN keys so maybe used on another PC I upgraded to 10, but they should be good for 5PCs at least I thought. Any idea what happened?