The thing about k9 is that it only blocks on the operating system not the server itself, which makes bypassing actually very easy. To bypass you'll ned a cd burnig software and the ISO for Ubuntu From Linux Here's a link.
Now download the CD version, burn the ISO to CD using any image burning software you like. After burning is complete put the CD in your computer and restart the computer.
While the computer is restarting, it should load into Ubuntu and not the OS on the Hard drive. Wait a litttle while, when a window pops up, click "try ubuntu", not "install" because you do not want to leave any traces.
Wait for Ubuntu to load, after it has loaded open the built in firefox browser and enjoy browsing freely without having to deal with the annoying Dog!!!