Tried the upgrade to that latest build 14946,1000 on my Dell tablet, didn't do well at all, dog slow and glitchy. Reset back to previous build 14926, but thing didn't go that well either. If anyone has a copy of 14926.1000 x64 they could throw my way to get my tab back to functional with an in place upgrade, it would be very much appreciated. Had it at one time, but decided I didn't need it anymore...dopey me.