Windows 8.1 Retail – Removing your Windows Product Key and Activation via the Command Prompt Right click the Start button or press [Windows] and [x]. Select Command Prompt (Admin) Type in slmgr.vbs /upk Your product key will be uninstalled. You may verify the removal by looking at the system properties: Advertisements Share this:TwitterFacebookLike this:Like Loading... Leave a Reply Cancel reply Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. ( Log Out / Change ) You are commenting using your Twitter account. ( Log Out / Change ) You are commenting using your Facebook account. ( Log Out / Change ) You are commenting using your Google+ account. ( Log Out / Change ) Cancel Connecting to %s Notify me of new comments via email. Notify me of new posts via email.