How to Change your Product Key and Activate Windows 8

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There are just some things you can’t get away from, and the command prompt is one of them. A lot of people with the new RTM of Windows 8 Professional have will run in to an issue with activation. When you download the ISO, at least the one for Windows 8 64-bit Professional from Microsoft’s TechNet, it installs with a 90 day trial license. By default, there is nowhere you can click to change the product key! So I fell back on an old trick where you can use the command prompt to change the key in Windows. Here’s the step by step guide:

  1. Hold the Windows key on your keyboard and press “R” (this will bring up the RUN prompt).
  2. Type CMD and press enter or click okay (as seen above) (you can also do this directly from the start menu and click the “Command Prompt” icon).
  3. Type: slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX (with the X’s of course being your 5×5 product key – note the key I used in the screenshot below is also a fake, so don’t waste your time).

That’ll do it! You’ll get a pop up Window confirming that the key has been changed, then you can proceed with your Windows Activation.

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