Windows 10: Is The Windows 10 Free Upgrade Still Free?

The USB key created by MCT is supposed to be bootable but I've only plugged it in on a running Win10 computer and in File Explorer run the setup.exe file, used it for Upgrading over a previous Version.

 

I did this twice today.

Downloaded the X64 iso, created the flash drive, updated from a running, activated, Windows 7 Home. Win 10 was activated when done.
Ditto for a X86 Win 10 to a running, activated, Windows 8.1 system. Again, Win 10 activated when install completed.

 

And by all means create an image of Windows 7 first.

 

Thank you all. I did create an Image with Macrium Reflect.

 

One last question.

Assuming I do upgrade and activation goes successful, how long do I have to wait before I do a clean install with confidence that the MS activation servers will remember the machine? I don't want to attach license to my MS account as this is a client machine.

Thanks

 

As soon as the upgrade activates. If you go to the activation tab of the updates & security settings control panel you will see Windows is activated with a digital license.

 

Thank you sir. Wanted to do a clean install but looks like I will do upgrade, activate and re-install.