Open Command Prompt as Administrator
Type: `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Press Enter
Check the displayed product key
If no key appears, type: `slmgr /dli`
Press Enter
If needed, type: `slmgr /xpr`
Press Enter
Open Command Prompt as Administrator
Type: `wmic path softwarelicensingservice get OA3xOriginalProductKey`
Press Enter
Check the displayed product key
If no key appears, type: `slmgr /dli`
Press Enter
If needed, type: `slmgr /xpr`
Press Enter