"PeerBlock is a new version (aka a "fork") of the popular Peer Guardian 2 software. It blocks "known bad" computers from accessing yours, for example governments, corporate entities, and those flagged for anti-p2p activities. Peer Block maintains the functionality of the original Peer Guardian 2 program, but includes fixes for various issues that remain unaddressed in the latest (~2 year old) version of PG2. PeerBlock supports Windows 2000, XP, Vista, and Win7 in both 32- and 64-bit flavors." Source: http://www.peerblock.com/ A more stable than PeerGuardian app with the same features & interface. Changing (editing)the Url's lists from "peerguardian" to "iblocklist" provides faster downloads also.