Windows 10: Invalid Win11 Pro upgrade key - how to undo?

Well, it looks like I got scammed.I purchased a key to upgrade my Windows 11 Home to Windows 11 Pro. When I tried to change the product key through the "Change Product Key" dialog under Control Panel's Activation dialog, I got an error code 0x80070490.I called Microsoft, and was told that the activation key I was sold is an MSDN key and therefore is not valid for the upgrade.So I decided I'd purchase a legitimate upgrade, and in the Activation dialog tried using the "Upgrade in the Microsoft App" option. Unfortunately, it appears that either my computer or Windows "remembers" that I've

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Upgrade from Win11 Home to Win11 Pro with a unused Win8 Pro Key?

As the subject says. I found two old Win 8 Pro keys that I never got around to use (actually one is on a physical Win8 DVD and the other is a Win 8 Pro key I bought online back when Win8 was launched).

I was wondering if I could use one of these Win8 Pro Keys (the digital one looks a better choice, since my laptop doesn't have a DVD reader) to upgrade my current Win11 Home install to Win11 Pro.

Thanks for your assistance.

 

Upgrade from Win11 Home to Win11 Pro with a unused Win8 Pro Key?

Hi. thanks for your quick answer!

Sorry for not having been clear enough. I don't need to upgrade my copy of Windows from Win8 to Win11, because I already have Win11 up, running and activated (the laptop originally came with Win10 and updated to Win11 without issues).

What I would like to do instead is to upgrade my current copy of Windows from Win 11 Home to Win 11 Pro using the Win 8 Pro key I bought in 2013.

PS In the mean time I found a post here on how to do the same thing with Windows 10, hopefully it also applies to Win11 but I'd still run a sanity check before breaking anything, including the EULA

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Is the win11 home key keept after upgrade to win11 pro?

I have a win11 home activated with a digital license connected to my ms account. Will the license still be available after upgrade to win11 pro?