Scottish Elises

http://everythingisnt.com/hosts

It will also get rid of the majority of the banner ads you see!

Testing this out at the moment, if you can be bothered here are more details on host files.

http://www.anti-phishing.info/what-is-hosts-file.html

Did this a few years back, removes the majority of adverts but it's worth keeping a copy of the original hosts file, as I found a few sites stopped working. Can't remember off the top of my head what they were though

Running for a week no with now issues, worth doing if you spend a lot of time online...