I apologize for asking what I fear is a noob question. I've tried to search the forum to get a good answer, but I couldn't find one. I have a valid key for 8 Enterprise N. It's not volume license and I did not activate it (on plain old windows 8) using KMS. I can't seem to find the proper 8.1 iso to use, if there is one. I tried installing the 8.1 ent n vl in a vm, then changing the key to mine, but it was not valid. Is there a particular iso I should be using? Modify the ei.cfg? Or am I just boned and there's no upgrade path? lol