A handy resource:
1. If you are using Spybot Search & Destroy on Windows32 systems, enter
C:\Windows\System32\drivers\etc\hosts
2. Spybot Search & Destroy will list all blocked connections; i.e. those that are redirected to the localhost.
3. You can manually add/delete entries.
4. It is a another layer of security!!
For details, check:
http://winhelp2002.mvps.org/hosts.htm
http://en.wikipedia.org/wiki/Spybot_%E2%80%93_Search_%26_Destroy