How do I fix the error: "The signature of this program is corrupt or invalid" when I try to install Retrotec software?
September 13, 2017
This problem is often caused by anti-virus programs. In particular we have found that using Internet Explorer and a virus protection program from Microsoft called 'Windows Smartscreen'.
Disable your anti-virus program, uninstall the earlier version and download and install the new version from the website:
