No infection from IE8 or 7, I only downloaded the malware programme from an answer earlier on this thread.
On my desktop I previously had Norton, but tried to get rid of it and put AVG which I'm happy with.
Norton were unable to stop large numbers of unwanted emails I hadn't written being sent from my computer and some of them weren't suitable to put it mildly and I got mad and removed as much of their programme before it got worse. You can never completely get rid of Norton, even with their special removal key and I didn't want to strip everything off my computer as I knew I'd be in a bigger mess because I had a lot of information which I needed to keep.
Hope that explains my reasons for taking IE8 off the desktop XP.
Regards,
Annaka.