Since apparently you didn't read my post carefully enough, I've used bold tags to help you.
If you have it running, disable it (or unload it, though I think just disabling it works) and see if it's that.
I advised him to disable it temporarily, so that he can test my theory. What he does next is his concern (he could add mirc to Norton's exclusion list for example). Although you made it sound like I'm giving dangerous advice to people, your post was totally pointless, if not stupid.