If you're running Windows XP; just be logged in as a privileged user.
Open a DOS command window, and type:
notepad C:WINDOWSsystem32driversetchosts
Put the following line in hosts:
127.0.0.1 www.google.com
Click: File >> Save.
Now try to open http://www.google.com/ with ANY web browser on your computer. If it doesn't work, then I advise selling your soul to the penguin ^.^
Remove the line you added from hosts to restore access to the Google, and add whatever website you want to block.
You may have to change the drive letter. I just used C: as an example
This will also work on all Linux distros through the following steps:
System
Root Terminal
Enter command: mousepad /etc/hosts
Follow the steps detailed above
In my experience, this may be rather limited on Linux systems as I have found that you can bypass the filter entirely by dropping the www.
