You'll need to clarify a little bit more.

So you have three computers now? 2x previous PCs that you've already upgraded from Windows 10 to Windows 11, and now a new one you've built and are needing to install Windows on?

Or are you replacing one of those two computers with this new one you've built?

Also, what type of Windows license are they? (e.g. are they retail Windows keys, an OEM Windows license, or a Digital entitlement that you purchased from the microsoft store using your microsoft account?)

Can't use the same license key on two computers..... That doesn't work.

引用自 PopinFRESH：

You'll need to clarify a little bit more.

So you have three computers now? 2x previous PCs that you've already upgraded from Windows 10 to Windows 11, and now a new one you've built and are needing to install Windows on?

Or are you replacing one of those two computers with this new one you've built?

Also, what type of Windows license are they? (e.g. are they retail Windows keys, an OEM Windows license, or a Digital entitlement that you purchased from the microsoft store using your microsoft account?)

I am building my 3rd, one of my other 2 sort of died on me and now I am just collecting parts. I know I can't use the same key on a new computer.

I had Windows 10 pro when I upgraded to 11 for free. I can get Windows 10 pretty cheaply with activation code. But I not sure if upgrading to Windows 11 will cost me extra.

So far as I know, the upgrade to 11 is still free. So long as your hardware supports 11......

引用自 HeyYou：

So far as I know, the upgrade to 11 is still free. So long as your hardware supports 11......

Okay, thanks. It saves me a bit of money that way.

引用自 FreshRevenge：

引用自 HeyYou：

So far as I know, the upgrade to 11 is still free. So long as your hardware supports 11......

Okay, thanks. It saves me a bit of money that way.

And I believe you can skip the Windows 10 install entirely. Just punch the Windows 10 key on the WIndows 11 install, and I believe it will still activate.

引用自 FreshRevenge：

引用自 PopinFRESH：

You'll need to clarify a little bit more.

So you have three computers now? 2x previous PCs that you've already upgraded from Windows 10 to Windows 11, and now a new one you've built and are needing to install Windows on?

Or are you replacing one of those two computers with this new one you've built?

Also, what type of Windows license are they? (e.g. are they retail Windows keys, an OEM Windows license, or a Digital entitlement that you purchased from the microsoft store using your microsoft account?)

I am building my 3rd, one of my other 2 sort of died on me and now I am just collecting parts. I know I can't use the same key on a new computer.

I had Windows 10 pro when I upgraded to 11 for free. I can get Windows 10 pretty cheaply with activation code. But I not sure if upgrading to Windows 11 will cost me extra.

If your Windows 10 Pro for the computer that died is a retail product key then you CAN use that same key on your new build; and if you had previously upgraded to Windows 11 Pro using that retail key then you will already have a Windows 11 Pro digital entitlement linked to the microsoft account you used when doing that upgrade.

You can just install Windows 11 Pro and during the installation enter your Windows 10 Pro retail product key and it will validate your digital entitlement for the Windows 11 Pro installation.

If it was an OEM Windows 10 Pro license then that will be "tattoo'd" to the OEM's motherboard so you won't be able to transfer it.