This Trojan is attempting to steal my bank details, please help

I posted last night about a suspect Trojan which has infected some system files apparently. 61883.sys, aec.sys and asyncmac.sys. I have pop ups for smileys and bingo, it is disabling my windows firewall on start up, but more importantly, i cannot access my internet bank sites, two of them as it is re-directing me to a site trying to get me to put in security details as part of a log in, even when i key the address in to the address bar. Does anyone have any ideas??? I have run AVG and it doesn't pick it up, neither does Windows Defender. Ad-Aware has picked up 30 'critical' objects, but my son turned the computer off before i could get a glimpse of them. I am re-scanning now.

Please Help!!

Dave. :cry :confused