I tried to use trendmicro's Housecall to check my computer. As soon as I hit the button to start the scan I was knocked offline. This is happening on both IE & Firefox. I only use IE for Win & IE updates. I' ve run Spybot & come up clean. My last Spy Sweeper scan also came up clean. I use ZA, AVG, Spybot, Spyware Blaster, Adaware regularly & also run the above mentioned Spy Sweeper as well as Win Defender. Am I being paranoid about this or could I be infected. This knocking offline also occurred once previously when I was using Stumble Upon. I uninstalled it & didn't have any further occurrences until today when I tried to use TrendMicro House Call. Any thought, suggestions?