Windows 10 - activation

If you have another PC with windows 10 run the tool to make it troght it to another PC

If you have the original product key you make the updgrade, once linked do the clean install

When you run the windows 10 eligibility wizard, you system automatically enrolls for windows 10 and you can do the clean install by downloading the image from Microsoft website

Yes but you need to save te ticket from windows 7

1. Open File Explorer and navigate to either \Windows\x64\sources or \Windows\x32\sources (Iso file or usb installation of Windows 10). Find gatherosstate.exe in the folder and drag it to the desktop.
2. Run gatherosstate.exe. This will create a GenuineTicket.xml file. Save this to a USB flash drive or anywhere else other than your system drive.
3. Install clean Windows 10.
4. Once Windows 10 is up and running, copy GenuineTicket.xml to C:\ProgramData\Microsoft\Windows\ClipSVC\GenuineTicket. (The folder is hidden by default)
5. Reboot your PC.
6. This will bring up a window showing system information, and at the bottom it should show Windows 10 as activated.

Check this

With the November update of windows 10, you can do it, you can activate windows10 with windows 7 or 8.x key
November update iso files are available on the net

If you activate Win10 you get a win 10 generated to your hardware.

IF you want clean install win 10 its no problem if its the same pc, just skip the part with the key and if your pc have internet your win 10 is activated.

or you read out your key with a tool and use it on clean installation.

I just did something like this. As long as you upgrade FIRST, your hardware will be activated by Windows 10, meaning even if you reformat and start from scratch later, Windows 10 will still active after you skip the installation (during the installation you will have to click "skip" for the product key the 2 times it asks you, but once its finished, it will activate.)

Also, there should be an option to remove everything and do a clean install when upgrading.

KMSPico FTW