General computer
Web Robots
Web Robots (also known as Web Wanderers, Crawlers, or Spiders), are programs that traverse the Web automatically. Search engines such as Google use them to index the web content, spammers use them to scan for email addresses, and they have many other uses.
HOST FILES
You can use a HOSTS file to block ads, banners, 3rd party Cookies , 3rd party page counters, web bugs, and even most hijackers . This is accomplished by blocking the connection(s) that supplies these little gems.http://www.mvps.org/winhelp2002/hosts.htm
These are only little files that can be downloaded at http://www.grc.com/default.htm there is also an explanation of what they are and why they should be used. This site is excellent for general computer security.
DCOMbobulator
Shoot The Messenger
Unplug n pray
XPdite

