Try the Microsoft Toolkit, you can download the latest version from torrent. Microsoft Toolkit can activate Windows and Office products.
So, I've conducted some tests with my old s**tty laptop, Win 8.1 x64 and build 10240. I didn't participate in the insider preview. What I've done was the following: 1) I wiped the HDD and installed a fresh Windows 8.1 and activated it 2) I made a Build 101240 ISO, threw it in and updated my Windows 8.1 without any updates whatsoever 3) Windows 10 was activated right away. Now the interesting Part; As I read here, I performed a clean installation afterwards. Hence, I wiped the HDD during the Win10 installation and threw a clean and fresh installation on the hard disk. I neither enter any Win 10 key nor used a MS Account, as well as I did before on my Win8.1 to Win10 update. However, Windows 10 wasn't activated and I wasn't able to do so. The question now to me is, how to circumvent this? Is there a possibly a file or registry record that needs to be backed up or fixed? I hope this post was somewhat helpful. (Sorry for my broken English)
Microsoft has already said this innumerable times: if you upgrade from an OEM license, Win10 will be tied to your hardware (because that's the way OEM licenses work.) If you upgrade from a retail license, the Win10 license is tied to you--not to your hardware--and your license will survive even a motherboard/cpu swap. Do people simply not listen, I wonder? The current 10240 build is *not* the RTM, and Microsoft has two weeks to make whatever licensing adjustments it pleases to the final RTM build.
@BerndLauert Maybe you should try to backup your licensed Win10 10240 with the MS Toolkit. It has an option to backup tokens.dat and the other license stuff. And then try to copy back those files on a fresh win10 10240.
I have a question regarding upgrade from win 7/8 does anyone know if you have to register for the upgrade to activate the system cause for some reason my windows 7 pcs wont give me the reserve win 10 icon no matter what I do, sorry if it was answered I read thru all this and didn't see anything.
go and register at windows insider program and you'll get the reservation and opt in for free upgrade
Upgraded from previous Windows 10 Pro build to build 10240 Downloaded ESD - Converted to ISO - Clean installed 10240 Activation was automatic
If nothing else, this thread shows that the experience is different for different people so locking the thread isn't a good idea. This is how we learn.