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I’m not sure about Windows 11, but I’ve transferred a licence on Windows 10. If OP gives the existing computer an unique name it will make transferring the licence slightly easier.
You need to install the same version of Windows on both computers - home or pro, not the version number
Build the new PC as usual and start the Windows installation. When it asks if you have a licence, select the option to add it later (I can’t remember the exact wording). Finish the installation and install your drivers. Either click the activation popup, or go into settings and click on the ‘This computer isn’t activated’ box. Open the activation troubleshooter.
There should be an option in there to transfer the licence from your old computer to the new one. If you have multiple licenses, having the unique name for the old computer makes it easier to see which one is the correct one.
@Mighty@lemmy.world hope this helps :)
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