Trend Micro's free scan, as you advised. I now have a folder called .housecall6.6 with various files in it, but there is no reference to it in Windows' Add or Remove Programs. David Austen
Trend Micro's Housecall is an online malware scanner: it's run from the web (housecall.trendmicro.com) using a kernel loaded into your browser. However, it downloads virus recognition patterns to your PC for speed and convenience. You can easily have 100MB of these signatures.
You can delete the folder if you don't want it hanging around. Of course, this will delete Housecall's logs, and if you decide to use the service again, there will be a delay while it downloads another set of signatures.