Clarity said:http://www.mvps.org/winhelp2002/hosts.htm
I've done this myself, it significantly speeds up 90% of my browsing experience. Basically any site that serves ads will be faster, as your computer won't even try to load them. It also prevents a major cause of site lockups. When you connect to the Bucknuts front page, you're also silently connecting to like 10 other machines around the web. If any of those are down, the whole page could stop loading completely and you could be looking at dead space. This is totally unnecessary and preventable on the server side, but that's not always done. This very easy change to Windows is entirely reversible, it's effectively impossible for you to break anything or screw anything up, you're literally just copying a text file to a folder on your computer. I personally recommend making a backup of the original by just renaming it from HOSTS to HOST_orig or something similar.
So I uhhh did this and wanted to undo it, not sure if I can just clear everything from my HOST file or not. And no I didn't take Clarity's advice on saving original, but *if* I remember correctly the original was blank. Any help here would be great, such as a paste of someone's unedited HOST file or telling me to just delete everything in there :p.