Why cant I activate Windows 11 Pro?

A while back, I bought a Windows 10 Pro key. It has worked on all of my devices and has worked in the past when I upgraded to Windows 11, but recently, whenever I try to use the key on Windows 11, it does not work. I also tried using the key and then upgrading to Windows 11, but that won't activate either. The key is valid; I made sure of that. Please help. Thank you.

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Hello,

Do you currently have the key activated on a certain device? If so, on that device, Can you please type cmd in the search on the taskbar and hit enter to launch command prompt, then run the following command:

slmgr /dlv

Then share a screenshot please. Thanks!
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With windows 10 pro, or upgraded to windows 11 pro?

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The command needs to be run on any device that's currently using this license key and is still activated with this license key, do you have access to that?
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Last updated April 17, 2025 Views 14 Applies to: