Buildapc

You've basically built a new computer; generally that means a new license. There's still a few things you could try though:

• Undo your changes and remake them individually with a little bit of time between each change (this is basically what you did on your first PC)
• Try the activation process and let them know it's the same PC, just with some hardware upgrades. I've had success reassigning an OEM key before using the telephone method.
• Buy a new (non-oem) license and register it with your account (I think you can have up to 5 licenses registered this way then you can pretty much arbitrarily revoke and reassign it among your future computers without hassle)
• Run the activator script

MS is generally pretty flexible regarding personal licenses and use. As long as you aren't trying to run the same license on multiple machines you should be fine. What you can't do is move the license from the OEM machine to your new custom build and expect the OEM machine to remain licensed.

https://github.com/massgravel/Microsoft-Activation-Scripts

Also links to Windows LTSC (Long-term Service Channel) images

If you had registered the old PC to your account, you may be able to transfer the licence through the activation troubleshooter. I don't have the steps written down anymore, but somewhere in the troubleshooter is an option to transfer the licence, and it lists all the installations registered to your Microsoft account.

I've used it two or three times on Windows 10, but haven't tried it on 11

Im not going to be the worlds greatest help, but as far as I am aware windows links your license to you motherboard ID or something. That's why even with a license the affair is going to be messy. Because they inched claimed the license is already in use and cannot be on the new pc.

I could activate then through a Telefone Call thing. But my licence was linked to my account and it showed in my MS account on their website that I own a licence. Without that I would have had no idea to proceed.

So my first step would be to check if you have had registered your old license in your MS account.

With OEM computers, the license is only for the hardware it came with.

OEM license keys can not be transferred to new computers.

Even if you get the key installed and activated, you are not legally licensed for that install.

You must have a retail license key to have transfer rights to new systems.

I'm gonna be that guy, even though I know it's annoying: This is why you shouldn't use ms products. ms is a company that prioritises their business model over making products that actually serve your needs. That is not the only choice we have, though they act like it is.

2 things:

1. You may be able to contact the manufacturer with your original model and serial information to get the key.

2. At the risk of sounding very "Lemmy," you could always install Linux. It is absolutely not as scary as it used to be.