Last few days a particular Trojan Buzus seems to have got through , disabling the Windows toolbar and hanging the pc so we have to reboot. Previously we have had the Trojans appear with infections but it hasn't triggered any obvious problem. Tonight we ran the routine Spyware Doctor check at 6pm removing the Trojan and its 68 infections but by 7.30pm it was back again and locked the pc up. Any ideas please, Spyware updates itself at least twice a day and we have Intelliguard a Windows Firewall on. What else can we try ?
I recommend you go to MajorGeeks and follow their malware removal tips. Worked like a charm for us. Be warned though, it takes a while -- but worth it.
Also, I have posted there for tech advice before and it was very, very good. Really helpful random woman in California kept giving me pointers over something like 4 days until probem was entirely solved.
Do you have a anti-virus package installed as well? Does Intelliguard do that too? A firewall is not necessarily an anti-virus program too.
I'd recommend that you also download and run Ad-Aware from: http://www.lavasoft.com/products/adawarefree.php
The anti-virus and the firewall should stop stuff getting onto the machine but you also need to make sure that whatever is on there is removed.
I'd also be tempted to reset your firewall list of allowed programs. Yes that means you're going to be bugged by lots of messages about various programs asking for permission to access the internet but it will give you some added confidence that you know exactly what's going on.