Invalid Certificate When Patching

Invalid Certificate When Patching

I have a number of updates that are failing to be installed on one computer.   Each of them is a Microsoft update or rollup from between October 2016 and December 2016.  They all fail with this error message:

The certificate for the signer of the message is invalid or not found.

No other computer has had this issue.

Patch IDs are

  • 21627
  • 21847
  • 21850
  • 21904
  • 21926
  • 21928
  • 103689
  • 103821

What would cause these patches to fail with this message?   Why have some 80 odd other very similar builds not been affected?

                New to ADSelfService Plus?