My firewall's antispyware updated, scanned for the hell of it, and it found only a registry key of an mIRC trojan... I'm wondering if this may pose a threat, or if it was just the remains of something that once was? Haven't even noticed any different processes running on my computer lately, everything is the same.

What firewall returned this result? Did any other anti-spyware application (Windows Defender, Ad-Aware, Spybot, ewido, etc...) return any similar results?

Zone Alarm returned the result, it didn't say specifically what it was, I did scan with Ad-Aware, Spybot Search & Destroy and got no results. I deleted it when I scanned with Zone Alarm though which I probably shouldn't have, could have quarantined. There's no way I know of to really retrieve what it was, but it was something like HKEY_LOCAL_MACHINE/SOFTWARE/.chaf.

I personally have had issues with ZoneAlarm. I don't trust it as it's way too resource heavy. The result you got was a false positive, so don't worry about it. :P

<3 Tarun! Thanks! And soon as my ZAP subscription is up I'm definately gonna try out another firewall, I think you reccomended Outpost.

Yeah, I use Agnitum Outpost Pro. I adore it. Link provided and it has a 30 day trial. Version 4.0 is coming soon too! :P