clean install?

[Mordumor]

I've been looking on site on how to uninstall profit ui and the auto updater and re do everything. When i load up the auto updater, it ask me for proxy settings, i uninstalled norton(since its a pain anyways) but it still asks me for proxy setting wont connect. i try to reinstall the updater, when i do that java loads up and it says it cant do it, some error. i've never had a problem with ui until i started using vista. someone told me in chat about a clean install and cant find those instructions on website. thanks for who can help