I was working on my Windows XP Pro machine when I got home this afternoon and noticed a drastic decrease in performance. I had not restarted my machine for about two weeks, so I thought that may be the culprit. I checked Task Manager, however, and found a program called gspotbot.exe running from my System32 directory. I stopped the process and immediately noticed that my system was back to normal. I did a search on Google for this executable name, and found it to be a client for G-Spot Bot (an IRC bot). I have updated Norton AntiVirus CE running on my computer and it did not detect it. I am also running ZoneAlarm Pro 3.0, but it punched straight through my firewall. Any one have any ideas how I could have received it and how it managed to get around my firewall? I am very careful with e-mail attachments and I do not download any programs from the Internet. Any help you can offer is greatly appreciated.

AJ