I've had trouble that was very similar with OE and using ME.I'm trying to remember what I did.
I think I did a 'repair' option on OE and cleaned out all my old mail.
I'm wondering if in the kerfuffle of removing this virus you may have removed a vital component.However I've no real idea beyond reinstalling everything.
Did you clear out everything the virus may be lurking in?What AV do you have?Have you tried checking in safe mode?
I reckon my mate Paul may be your best bet.He has a lot more patience than most and loves a puzzle.
Incog.