Windows 8.1 Offline Activation

Windows 8.1 is pretty slick, but if you're on NIPRnet, there is 0% chance it will activate itself over the network. Gone are the days of using the 1-800 number to call Microsoft and activate over the phone with 40 some odd digits, so if you're lucky enough to move to Windows 8.1 (Bye bye Pass-the-Hash Hacks!) here's how to activate IF you have a product key handy (Thanks, MSDN Subscription!)

1. Copy your product key to the clipboard

2. Right click on the Windows 8.1 Start Thingy and choose Run

3. Now type "slui 3" and hit Enter. This kicks off the Windows Activation Client and the option "3" tells slui to run the GUI.

 

4. You should see the below, where you'll paste your Win 8.1 key and hit close .. no need to wait for the spinning "I'm working on something" circle gif that will load. 

5. That's it! Enjoy not being harassed every week about your activation key. YOU'RE WELCOME.