Windows 10: Can I purchase a Windows 11 pro retail license to activate Windows 10 pro?

As I known, Windows 10 has not been purchased. So I can only purchase a Windows 11 pro license. But I have to setup Windows 10 pro due to some special app only support on Windows 10.Can I purchase a Windows 11 pro retail license to activate Windows 10 pro?

:)

 

Free upgrade from Windows 11 Home to 11 Pro using 10 Pro retail license

My current computer has an activated Windows 10 Pro retail license. I'm planning to replace my current computer by buying a new computer that comes preinstalled with Windows 11 Home, and then I understand I can use my 10 Pro license to upgrade to 11 Pro for free.

What's the most straightforward way of accomplishing this? The obvious approach that comes to mind involves two steps:

1. Reinstall Windows 10 Pro on new computer and activate with my existing retail license.
   
2. Upgrade new computer to 11 Pro for free through the settings.
   

Is there a simpler way of doing this without having to reinstall Windows 10? For example, would it be possible to somehow "trade in" my Windows 10 Pro license for 11 Pro? I'm fairly new to Windows licensing and am just trying to understand what is possible/best practice, with minimal effort.

 

windows 11 pro oem to retail?

i purchased a prebuilt pc that came with a windows 10 pro oem license eligible for the windows 11 upgrade. i have since upgraded to the windows 11 pro oem version. my question is if i purchase a windows 11 pro retail license, can i change the installed version by changing the license info on the pc using the new retail license?

 

Can't activate my Purchased Windows 10 Pro License.

have 2 computers, both running Windows 10 Pro.

The first computer was upgraded for free to Windows 10 Pro from Retail Windows 7 (Pro).

I purchase Windows 10 Pro and license from Windows Online Store.

My first computer shows up as activated. I can't activate my purchased license on my second computer.

I purchase a third license so I could register my second computer. Now my Windows Account Devices, my first computer shows up activated once and my second computer shows up activated twice with numbers I don't recognize. I received my second license number
by email. I never received my third license number but it was activated.