I have seen a number of reviews on this site over the past few months on various sites. The reviews seemed to be positive so I continued and installed PeerBlock. It does exactly what it says. Even though initially this was used to stop the Government eyes from preying on you when downloading torrents, it now can be used to prevent hackers and stop malicious software being installed on your computer through ads. It will block over 700,000 IP Addresses, which is fantastic! Makes you feel that sense of been secure.