Windows 10: Windows 10 Product Key All of a Sudden Not Valid after 2 years

I purchased a digital copy of Windows 10 to install on a barebones NUC system. I've been using it with the product key provided at purchase with no problems until the past week. All of a sudden I'm been instructed on screen to Activate Windows and my once valid product key is now not working. Any advice?

:)

 

Valid Win7 Product Key not accepted by Win 10 upgrade

Hi,

I did not realise I had been at all vague, my apologies.

Unfortunately my neighbour now has his laptop back as I got nowhere. I have suggested he wait until the windows 10 upgrade system makes it available through windows update (it is in the queue).

As stated, I have tried running from the media created by the media creation tool to a USB (this is what I used to successfully upgrade my laptop and surface Pro). I have also run the media creation tool and opted for it to upgrade directly rather than save the files.

The operating system is Win7 Home premium OEM version. The key is valid and I re-validated it to be sure with the MS online actvation system. The laptop is 64-bit.

On each occasion it goes through the initial install steps and then gets to the screen where it asks for the product key.

On this screen there is no skip option and as the product key is not accepted, the only option is to cancel the install.

For some reason the upgrade seems to be taking a different path on this machine and does not give the skip option.

Regards
Mike

 

windows 10 says it can't validate product key

When I upgraded my windows 7 with win10, it says it cant validate my product key? Why? Can you give me the steps to follow to validate it?

 

Windows is not activated with valid product key

I bought this license and activated this Windows like 1 or 2 years ago, and it's a valid key, I had my Windows Activated and everything works perfectly until today when I saw a watermark at to bottom corner asking me to Activate Windows.

I tried to reenter my product key but it says that I do not have a valid product key and refuse to activate my windows

Is there any solution for this?

P.S. I didn't reinstall my Windows or make any hardware change