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How to change Windows 10 product key

If you need to change the product key of the installed OS, for example. suppose you have installed Windows 10 initially with a generic key, and then wish to change it to an authentic key that you purchased, this can be done quickly without reinstalling. You don't need any third party tools or complex Registry tweaks. Note: This trick also works in Windows 8.1, Windows 8, Windows 7 and Windows Vista. Follow the steps below.

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