slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX (Replace the X’s with your actual 25-character product key, including hyphens)
slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX A pop-up dialog will appear: “Installed product key successfully” Click OK . Optional Next Steps After installing the key, you usually need to activate it: slmgr /ipk