I've been using this free Micro scanner for some time on my work laptop. However, once I brought the laptop home and dropped it on my home network, the application starts up, tries to retrieve the latest definitions and then dies with the word "error" - nothing more descriptive. I'm running on Win XP-Pro with a Linksys router/firewall between me and the Internet. Does this micro scanner use any weird ports that I need to open on the firewall? Thanks.