Why am I getting an error, even after installation of Root Certificates on the Client PC ?

This sometimes happens due to Antivirus or End Point Security software. They don’t trust non-public Root Certificates and tell the browser that the Intranet Root Certificate is not trusted.

In one case, we noticed that AVG antivirus intercepted the network connection by keeping its own SSL in between, passing an error to the browser that SecureNT Root Certificate is not trusted. The customer created an exception for the error and the browser error stopped.

This problem is not seen with Avast antivirus. Just for information.