Windows 7 Ultimate x64, Microsoft Security Essentials, and no other hotkey software or media players running. I'm not sure what the relevance of the questions is, given that in _one_ mIRC session, they still work - and it doesn't matter what order I start the sessions in; it's the same one that works. For that reason I suspect that it's something I did _in mIRC_, but I have no idea what, or where to look to compare settings/files.
