HELP Question about Viruses

[Atrocities]

I was wondering if a PC could be infected with say a spy bot virus while connected to say MIRC? Your IP is displayed, and if you happen to have the fire wall off so you could play a IP game of SEIV could someone sneak it in?

I am asking this because this morning I was on only two web pages, shrapnel and PBW and was getting anti virus warnings about this spy bot. (W32SpyBOT Open_Me.exe) It just happened again and I have just reconnected to one of the web pages.

Second question could one of these pages be attempting to send the virus to my computer?

To the best of my knowledge I have not opened any file from anyone that has not been scanned first. Only from poeple I was expecting files from. Today is the first day that this has happened.

I was on MIRC most of the day yestarday and recall reading that sometimes it can be exploited for such a thing as sneaking a virus onto someones PC. (A blanket attack.)

I simply do not know. I am running a full scan at the moment and will try and find if I am infected.