During the last October, I have activated my W8.1 Enterprise thanks to the cmd method (enter a key with the Internet turned off). W8.1 has worked correctly but today, I learn my W8.1 license has expired and I have to update my W8.1 toward the best version which exists and thus activate my W8.1. So I've decided to use the KMS method but it does not want to work ! I can't enter a new serial key in settings, it explains me the computer will restart every 2 hours. I have entered in cmd the code in order to erase the current installed key but when I start KMS, the same notification appears again which order me to update W8.1. So I can't reactivate W8.1. Please I need help ! How to delete this notification ? How to reactivate my Windows without any update or any system restore ? I would be grateful. Thanks in advance !