Has quirks ....

I use KIS (Kaspersky Internet Securtiy) already quite a while, but in the 2015 version, I was close to despair.
Who can pass up to use https pages is hereby well served.
I could take a few Search the point of failure to locate (people with similar problem googling but best times "KIS 2015 (Error code: SEC_ERROR_UNKNOWN_ISSUER)" ... the first result provides an accurate guide as it is running again).

As antivirus program I'm happy with KIS per se, but I expect that I can use without restrictions after installing my Firefox and not only large must identify the source of error.
This makes it user-unfriendly, in my view and for the people not too Compute Raffin are impossible to use it.