6. enter product key. the product key should be printed on the box that the windows 8 dvd came in or included in an email you received after buying windows. 7. windows will now automatically detects whether the product key is valid. if your product key works, click activate. 8. if windows activation is successful, click close.. Next to the product id, you should see an activate windows (windows 10) link or change product key (8/7/vista) link. click or tap on this link to start the process of changing your windows product key.. Although this guide is specific to windows 10, the control panel, slui.exe, and slmgr.vbs methods that we're showing you here will work to change the product key on windows 8.1 or windows 7. more.
Under the windows activation section at the bottom, click on the change product key link. (see screenshot below) 6. type in your new valid windows 7 product key number that you want to change it to, and click on the next button. (see screenshot below) 7. if activation was successful, then click on the close button. (see screenshot below). If you upgraded to windows 10 for free from an activated copy of windows 7 or windows 8.1, you should have a digital license instead of a product key. a windows product key is a 25-character code used to activate windows.. The product key or digital license can't be substituted for one another. a digital license (called a digital entitlement in windows 10, version 1511) is a method of activation in windows 10 that doesn't require you to enter a product key..
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