whoa! ok, there is huge diff between registry and windows explorer where you find what all is on your puter and can delete files and stuff. do NOT go mucking about in the registry unless you are absolutely positive what you are doing, and even then do a backup first. and think about it. then have coffee and be sure you are where you wanna be and removing what you really want to. And just deleting files prolly wont fix the prob. See this
web page What i meant was that some trojans will make changes to your puters registry that an antivirus proggie isnt able to fix, that you will have to do it. The first thing you have to do is go run that online scanner and find out what trojan is causing this (since you said you didnt install mIRC on that puter, and i assume you cant find it under uninstall thingie). If you dont know what trojan, and what it did, you wont know if you have to do anything in registry. For an example, see this
thread Some trojans hide well, run the scan and see whats going on, then go from there
