I did a clean install with the latest Win 10 ISO on top of a legit ver of OEM Win7. It keeps telling me the key is blocked :(

Error 0xC004C003

C:\WINDOWS\system32>slmgr.vbs -ipk VK7JG-NPHTM-C97JM-9MPGT-3V66T C:\WINDOWS\system32>slmgr.vbs -ato

C:\WINDOWS\system32>               Reports this Error 0xC004C003

Activation server says key is blocked

Any ideas? thx

Bruce

  You cannot do a clean install of Windows 10 unless you have a valid Windows 10 key OR you have upgraded to Windows 10 and the Win10 upgrade has activated. In the latter case you can skip the product key page and it will activate automatically.

 

Bill,

I was running the technical preview and upgraded to 10 as you say.

So should I just let it run for a week or two and let it activate? I'm not sure if that's what you are suggesting?

Kind regards,

Bruce

If you want the "free upgrade" (no need for a product key/purchase), perform an in-place-upgrade, not a clean-install.
You do this, whilst running the older/qualifying OS (e.g. your OEM Win7)

If you perform a clean-install, and have never been through the in-place-upgrade on this machine, this machine will never activate as genuine.

https://www.microsoft.com/en-au/software-download/windows10

[Tech Preview/Insider, is kind of irrelevant, unless you want to remain on the Insider program forever]

Don,

I'm going to attempt to go back to a full backup of 7 and install preview and let it tell me when to upgrade. I jumped the gun.

Thank you,

Bruce

• Edited by LaZuruz 7 hours 4 minutes ago

  Indeed you did. If you were running the Win 10 preview and want to leave the Insiders program, the fastest way to get the free upgrade is to reinstall Win 7 and upgrade it.