i see your point, but there would be probs if they were told to just click some button in mIRC. As i mentioned, no one resource is going to find everything. (and how do we choose which one to send them to anyway?) We'd also need to come up with a way to tell them to go back and close mIRC while they do the scan. If that one misses finding something, it could lead to false sense of security in more ways than one. getting trojans is easy, cleaning up after them can get pretty complicated. having ppl assume they can just click a button in mIRC and everything will be all better would be misleading. not to mention that they may figure oh what the heck, i dont need to worry, all i have to do is click a lil button to fix everything so its ok to click/accept all i want.
I think a better way to help users is to educate them. Keep a good list of resources to pass along. there are so many trojans out there, clicking on urls is just one way to get infected. more prevalent perhaps, but certainly not the only one ppl get IRC type trojans from. i'm all for adding more info to the help file. altho honestly, ppl dont look thru the options or the help file most of the time to begin with. thats why help channels and forums like this one see the same questions over and over. thats just part of helping

addition:
oh wow Landon, good point, i didnt even think of that. i can just see it now, users running to help channels thinking they have a virus just cause they noticed a button for virus scan. i dont mean to sound like i'm belittling anyone, i'm not. Heaven knows we were all new once, but i can easily see just what you described happening. We've all had users who think nickserv is a person stalking them and stealing their nicks, or a global msg from a server is someone trying to hoax them, etc. New users arer easily overwhelmed and seems like its human nature to look for a person to help you rather than RTFM.