The first thing is to verify that it is this particular AV program that is causing the problem. An obvious way to do that is to temporarily disable it while you connect, to see if the problem goes away (but be sure to re-enable it immediately afterwards, otherwise you will be unprotected).
If you are sure that ESET is causing the problem, you should contact the company for support.
ESET Smart Security is an established product, and I doubt if there is anything fundamentally wrong with it. But they do offer personal support, so it's worth getting in touch.