Everyone, this is NOT A MIRC PROBLEM!.
This is a Norton problem which is monitoring your connection and looking for certain catch phrases which have been reported in trojan/backdoors for mIRC. mIRC is working as it should be, therefore; this is not a mIRC issue. Your mIRC disconnects because of Norton and only Norton. mIRC plays no faulty in this. Also, if you could maybe try messing with the Norton settings to see if you can exempt mIRC.
-Zach
