I have windows 7 home and upgraded to 10 about a few month ago and I tried your OemKey and it gives me, Unable to open MSDM table!The product key won't be found on the ISO, unfortunately. If you have Windows running and activated you can always look up the key it was registered with with something like magic jellybean key finder? But hopefully you'll find your kind and it won't be necessary to go down that route.
I have windows 7 home and upgraded to 10 about a few month ago and I tried your OemKey and it gives me, Unable to open MSDM table!
If you upgraded to the free upgrade of Windows 10 from an activated Windows 7 or 8.1 PC, then you will not have a product key. Instead, the PC gets registered on Microsoft activation servers with a digital entitlement that will always be used to activate Windows 10 on that PC.
Starting in Windows 10 Insider Preview build 10565:
Device activation improvements: Microsoft has received a lot of feedback from Insiders on making it easier to activate Windows 10 on devices that take advantage of the free upgrade offer to genuine Windows by using existing Windows 7, Windows 8 or Windows 8.1 product keys. If you install this build of the Windows 10 Insider Preview on a PC and it doesn’t automatically activate, you can enter the product key from Windows 7, Windows 8 or Windows 8.1 used to activate the prior Windows version on the same device to activate Windows 10 by going to Settings > Update & security > Activation and selecting Change Product Key. If you do a clean install of Windows 10 by booting off the media, you can also enter the product key from prior Windows versions on qualifying devices during setup. Refer to the Insider Hub for more information on these activation improvements including requirements.
Can I reinstall Windows 10 on my computer after upgrading with free upgrade?
Once you’ve upgraded to Windows 10 using the free upgrade offer or Media Creation Tool on an activated Windows 7 or 8.1 PC, you will be able to reinstall, including a clean install, on the same device. You won’t need a product key for re-activations on the same hardware. If you make a meaningful change to your hardware, you may need to contact customer support to help with activation. You’ll also be able to create your own installation media like a USB drive or DVD, and use that to upgrade your device or reinstall after you’ve upgraded.
It does the same on my Windows 7 and 10, mind you, both were upgrades from a previous version of Windows. Try Belarc Advisor Belarc Advisor
I suspect, although not sure, that a recent Windows Update may have broken it. Let's see what the software maker says when he spots this.
Read this tutorial: Product Key - View in Windows 10 especially this bit:
Great Thank youI've asked him internally, hopefully he'll answer soon.
Well I just tried a different computer that had windows 7 and I upgraded about a couple weeks ago to windows 10 and the same thing came up Unable to open MSDM table! So something is definitely up.Great Thank you
OK I know windows 7 does not have it embedded on the machine but Microsoft said once you upgrade to windows 10 there will be a key embedded so after the one free year windows gives you to download passes and say your drive crashes and you need to reload 10 it will find the key embedded on the machine so you can again load 10 back on the machine for free unless of course your motherboard crashes then you are out of luck because whatever was embedded will be lost, so that is why I wanted to use your product key tool to get the key but you are saying it is not embedded which is the opposite of what windows is saying. So after the free year is up with windows and you have a problem with the computer and you have to reload 7 then upgrade to windows 10 what is windows 10 looking for to know that you have upgraded during the free year there has to be something embedded on the computer? Why do you have this product key tool for windows 10 if there is nothing to look for? And if you buy a machine with windows 10 already installed then there will be a sticker on the tower or laptop.@Jeff10 the answer is in my reply above - it means you don't have an embedded product key on your machine. It doesn't have anything to do with Windows 7 or Windows 10. No Windows 7 PC has an embedded product key, anyway.
Jeff, new PC's don't have the sticker, that's why this tool exists. Windows 8 and Windows 10 PCs don't ship with the product key label/sticker anywhere on them.
You should read about the product first: Windows 10 Embedded Product Key Tool
The tool is working fine - it's telling you that your PC just didn't come with an embedded key and that there's nothing it can do! It's not a general product key finder tool, it's a tool to look up the embedded key in your machine only.
Sorry, I made multiple amendments to the above after I posted it.