A helpful tip comes from David Passell: "Here is a site to go to if you want to see if virus detection software is working. http://www.rexswain.com/eicar.html
"It gives you three situations that you can have downloaded. When i downloaded any of them my Mozilla (Firefox) browser gave me a 'Malicious Software Detected' and blocked the load.
"What was downloaded is a harmless test virus. If not detected, it gives you a message." And David explains, "Somebody at the last LUGY meeting told me about this. That's the Linux User's Group of Yavapai County. They have an evening social meeting early in each month. Idea is similar to our PMUG brunches."