Changing product key after Installing Windows 8


  1. At the administrator command prompt, type in "slmgr.vbs -ipk "

    slmgr.vbs -ipk 00000-00000-00000-00000-00000
  2. To activate windows after changing the key, run "slmgr.vbs -ato"
More details in the following link:
http://tweaks.com/windows/39026/change-windows-product-key-after-install/

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