Internet explorer has a restricted sites options under security. This site installs a list of restricted sites into the registry. The list is extensive and prevents a lot of unwanted visitors accesing the computer.
http://www.staff.uiuc.edu/~ehowes/resource.htm (Restricted sites)
This programme is somewhat similar to the above one. Gives a very good reason for using it when you access the site.
http://home.earthlink.net/~doniteli/index46.htm#a (Disable VBS scripts)

http://grc.com/cih.htm (cih virus recovery)
http://accs-net.com/smallfish/cookies.htm
http://www.freebits.co.uk/internet.html (Free internet utilities)
http://home.earthlink.net/~rmbox/Reticulated/Toys.html (trojan recovery)