ignore him. encrypting your filesystem is not the greatest of ideas unless you know what you are doing. You could easily lock yourself out of all of your data, which is not something you want to do, i assume.

139 being open is not such a good thing. I believe that is the port for windows filesharing, and opening that open to the internet is a pretty bad idea.

what firewall software are you using, if any? are you behind a router, or do you plug your computer straight into a modem?

btw, don't bother reading grc.com. 99% of the stuff he writes is not worth reading. For whatever reason, he likes to spread massive FUD