New
#141
You do not need an MSA for activation - the error you are getting (blocked key) is because Windows can't verfy the store licence you were granted when you upgraded and tries the (generic) key which is obviously blocked for activation.
We are still trying to figure out how and where to check for errors with this new activation, thus can't categorically advise ATM, except reboot and see if the activation process can be re-initialised.