OPC DA Server
You receive the following error message when you try to install an OPC Server:
Disk1.cab has an invalid digital signature. This may indicate that the cabinet file is corrupt.
Automated Solutions digitally signs its installation packages to ensure that the installation software has not been tampered with.
This error can occur when the target machine has no internet connection and Windows Installer fails to verify online the digital signature.
Since Windows installer is unable to contact the certificate provider that can verify the installer's security certificate, it will prompt with that error during installation.
There are two workarounds for this issue, select the most appropriate: