Where to purchase a Windows 10 license for a custom built PC?

jimbo45 said:

Hi there

You COULD join the insider program and get W10 insider --there are some ESD's for 10240 around --use the tutorial to convert to ISO and then clean install. It won't activate (yet) but good for testing etc and it's FREE -- so you could use this until you get your retail license.

Cheers
jimbo

Or, download the 90 day enterprise eval trial. It's out, I downloaded it earlier today from the technet website. Freely available to everyone.

Qub1 said:

Okay so I'm really confused. On the entire Microsoft site and store there is no mention of any method to purchase a Windows 10 license. All they offer is a free upgrade. I can't do that since I built a custom PC with no prior OS. So I need to buy a license.
Where can I find a good, legit place to purchase a Windows 10 license (and maybe USB with the ISO on it)? I'd like to purchase a Windows 10 Pro x64 license, and if possible for 3 users.

So can anyone recommend a store? I'd prefer not to wait weeks for it to arrive. I've searched already but I couldn't find anything except webshops that say they'll deliver it in 10+ days, which is too long.
Thanks!

Maybe they didn't have it when you looked earlier, but the Microsoft Store now lists a downloadable Win 10 Pro for purchase:

Windows 10 Pro: Upgrade or Purchase - Microsoft Store

This is for the USA. It may be available from your country. (Or not.)

Qub1 said:

Because I read somewhere that users who picked the free upgrade will get limited support, and they will not receive a key for Windows 8 and have to install 7 every time and then upgrade. I'm not sure if this is true, but I'd rather not take the chance.

That's not true, once you upgrade for the first time, your device will be registered here:
https://account.microsoft.com/devices

After that, you can use an ISO to do a clean install as much as you want without having to use any key since your device will automatically be recognized over the internet.

It will definitely be possible to do a clean install once Windows 10 has been activated. No need to go the update way again if you want to reinstall it. So if you want it now get a Windows 8.1 license (or 7 if you can still find one since they are no longer on the retail market).

I recently bought Windows 7 pro licence from Amazon £15. Installed Windows pro 7 activated Windows 7. Downloaded windows 10 preview .iso upgraded to Windows 10. Windows 10 is showing as activated throughout build 10133 to build 10240.

Omega said:

That's not true, once you upgrade for the first time, your device will be registered here:
https://account.microsoft.com/devices

After that, you can use an ISO to do a clean install as much as you want without having to use any key since your device will automatically be recognized over the internet.

It has nothing to do with your link. The device only shows up there if you sign in with your Microsoft account. You can upgrade and use Windows 10 without using an MSA. And the reinstallation works fine, so clearly it is not stored in a Microsoft account. The information seems to be stored in the Activation servers.