Lost Office 2013 Activation after Upgrading Windows 10 from build 10130 to 10162 Orginal system was Windows 8.1 Pro (Dell OEM).  I upgraded it to Windows 10 Insider Preview Build 10130.  Office 2013 Pro SP1 (from Action Pack) was already installed and working on 8.1 and it worked after the upgrade to Windows 10 Build 10130. Two days later I upgraded from 10130 to 10162 and now my Office 2013 is no longer activated.  I tried to activate it and I get the message "This product cannot be activated because the product key is not valid." I went back to my Action Pack, got the key that is issued to me and applied it in the control panel.  Then I opened Outlook and went through the Activation with the exact same results.  It appears that build 10162 is preventing Office 2013 from recognizing a valid key. I tried a repair of Office, no change.  I tried to activate by phone, denied.  Not a valid key.  No option to talk, just automated and it hung up on me after telling me that it was not valid. I uninstalled Office 2013, rebooted. Logged onto Action Pack and downloaded Office Pro 2013 SP1 with Activation Key.  Installed from mounted iso and tried to activate.  Same problem.  "This product cannot be activated because the product key is not valid." I uninstalled Office 2013, ran the Microsoft Fix IT (http://go.microsoft.com/?linkid=9815935) to completely remove the prior version of Office.  Installed from mounted iso and tried to activate.  Same problem. I have since upgraded to Build 10166.  I uninstalled and reinstalled Office again.  No change.

Shows that Office is not activated and will stop working on Aug 9th

Keith

Hi,

Here I don't have the exact same Windows System(Windows 10 Build 10162) to test, but based on the description I feel the issue is that the product key is considered invalid since the System upgrade.

Basically one product key can only be used on one system, and the upgrade may let Office/Microsoft think it's a new install on a new system. I suggest you contact the customer service, explain the scenario to them and ask if they can provide some help:

http://support.microsoft.com/gp/customer-service-phone-numbers/en-us

Regards,

Melon Chen

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