This patch package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer patch package. WSUS Hotfix Update

  Recently I was trying to install hotfixes for Windows Server Update Services (WSUS) but the setup program would immediately fail with this error: This patch package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer patch package. I had this problem with these two updates: An…