Hi Superdave,
Many thanks for all of you advice. I had previously been told that running Windows firewall alone was sufficient and had gotten rid of my Zonealarm. I have no idea how the windows firewall got turned off though...
Anyway. I did as you said and added Commodo, which so far seems a little less intrusive then Zonealarm, so I'm happy there on all counts.
I am keeping the SAS and MBAM to complement AVG 8.5, as well as running CCleaner. The big difference that cleaned the virus though was the Windows SP. It seems that when it installed it uninstalled the infected old drivers (which have now been CCleaned!)
So again, many, many thanks :-D
I currently run AVG. I also now have sas and MBAM. Do the spybot/adaware/spywareblaster programme slow the machine down much? Why so many programmes that seemingly serev the same function? Or do they all do something alightly different?