Anti-virus recommendations.....

I have no problem with MSE or the free anti-virus products. I buy a retail product for the firewall and extra features. Most of the coffee shops, libraries, RV parks, etc. have unsecured WiFi. I don't want some bored, war driving, snot-nosed 15 year old to gain access to my PC via one of these networks. They probably can anyway, but I can make it as unappealing as possible. Also many of the WiFi networks are still using WEP security (which is easily breached). There are also other features to the like anti-phishing, anti-spam, parental controls, scanning search results for hazardous URLs, data protection, encrypting IM chat, identity theft (for an additional fee), yadda, yadda, yadda.

So, for RVers, I also recommend any firewall product that is better/more robust than Windows Firewall.