How to Use Slmgr to Change, Remove, or Extend Your Windows …
https://www.howtogeek.com/245445/how-to-use-slmgr-to-change-remove-or-extend-your-windows-license/
WEBJun 6, 2017 · First: Open an Administrator Command Prompt Window. View Activation, License, and Expiration Date Information. View the License Expiration Date. Uninstall the Product Key. Set or Change the Product Key. Activate Windows Online. Activate Windows Offline. Extend the Activation Timer. Slmgr.vbs Can Perform Actions on …
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