I would like to hear recommendations for security software. First I'll give some background. I am in a small town with only one high speed option. A neighbor has set up a wifi hotspot. He is providing a pay service and seems to be fairly tech savvy. Computers are more of a hobby and he does not have any formal training or background just kind of learned on his own. My question is since he is my ISP how can I secure my transmissions so that he could not "peek" at where I've been or track my history. I have a wireless expander connected and our computers connect to the expander. Someone suggested "onion routing" software? I am a newbie and don't want something difficult to set up or will slow me down. Even pay services are welcome I just would like to hide my tracks from my ISP. Any suggestions? Please note he provides the service so I assume security is little trickier than a snoopy neighbor piggy backing my network. Any suggestions would be great!!

I am running Symantec security suite, Windows XP (Sp2) and a D-Link expander. My browser is IE6 but willing to use others if needed.