YCFHQ-9DWCY-DKV88-T2TMH-G7BHP

1: Install then with internet off put in the above serial.

2: Add the following to your hosts file;

# Microsoft Activation
127.0.0.1                               mpa.one.microsoft.com 
127.0.0.1                               sls.microsoft.com 
127.0.0.1                               genuine.microsoft.com
127.0.0.1                               wat.microsoft.com
127.0.0.1                               mpa.microsoft.com

3: Restart the PC then update windows.