no worries, I can understand the need to see if it lasts.
We often see these intermittent problems and they are hard to track because they are intermittant. If you get a clean report you don't know if there's nothign to see because the problem is elsewhere or because the problem was just not happening at the time.
The Anti Virus Program is always somewhat of a natural suspect, because if anyone has taken a hit from the malware, it surely is the protective software that was either killed off or fooled into not seeing the infection. I would think that in general reinstalling your anti virus program after cleaning off an infection is not wrong.
Let me know if you find anything to be out of order again in the next couple of days.