In reply to veteye:
> It tried to install an extra layer of software for online banking which did not seem to be any appreciable amount safer.
Not Trusteer Rapport, by any chance? I installed that when it was first offered by my bank a few years back. It turned out to be a horrific drag on system performance so I ditched it. I've seen numerous reports since of other people having the same experience. I would get rid if that's what you've got. It's not even clear to me what it achieves, so long as you are rigorous about malware hygiene on your machine anyway. I've certainly not had any issues with online banking fraud since I got rid.
I'd also ditch the Kaspersky AV and stick to Microsoft Security Essentials. AFAIAA MSE is as good as any of the other offerings out there, and it's free. Certainly if you already have MSE (and it's active) then adding another AV will only create trouble.