New Post: Verification of file signature failed for file

Oh ok, I would have preferred you open another post, but never mind :-)

The certificate (it's showing code-signing) we are trying to use was generated from WPP.
In fact, it's your Wsus server that have generate it. It's a self-signed certificate.

So, you are using a Wsus on Server 2012. With a self-sign certificate.
The certificate has been imported in :

  * (Local Computer)\Wsus certificate folder ?
  * (Local Computer)\Trusted Publisher ?
  * (Local Computer)\Trusted Root Certification Authority ?

You have reboot the server after importing the certificate ?
WPP run directly on the Wsus server.
Does the Wsus server set up to store updates locally or clients will download it from MS servers ?