http://housecall.antivirus.com/pc_housecall/
Thank you for using HouseCall, Trend Micro's online virus scanning and
cleaning service for your home PC or laptop. Your computer is now virus
free -- until you encounter your next virus-infected file.
HouseCall does not provide virus protection in real-time, only while you
are connected to HouseCall. So your computer is still vulnerable to virus
attacks in between online virus scans.