Windows 10: How to check product key is valid

Hello, bought product keys years ago but unsure which ones are live, is there a quick way to check this? As I don't want to make purchases that would lead me to having to make more.

:)

 

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

 

Product Key

If it was a valid product key, it may be stolen by now.

You NEVER post product keys in online forums.

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There is no public list of product keys kept to check anything about them.

You install the operating system and attempt to activate it using the product key.

That's how you check.

Cheers.

 

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?