The condom for P2P :eyemove:
PeerGuardian 2 is Methlabs' premier IP blocker for Windows. With features like support for multiple lists, a list editor, automatic updates, and blocking all of IPv4 (TCP, UDP, ICMP, etc), PeerGuardian 2 is the safest and easiest way to protect your privacy on P2P. Plus, by integrating with Blocklist.org, lists are built custom just for you.
Note: Blocklist.org is under a lot of pressure. We are trying to fix it ASAP but until then if you get errors while updating you can add the lists from Methlabs Sync.
http://peerguardian.methlabs.org/pg2.html
* I'm testing this out myself...sitting in the background it is only taking up 0.7M of memory and 0% CPU for me
PeerGuardian 2 is Methlabs' premier IP blocker for Windows. With features like support for multiple lists, a list editor, automatic updates, and blocking all of IPv4 (TCP, UDP, ICMP, etc), PeerGuardian 2 is the safest and easiest way to protect your privacy on P2P. Plus, by integrating with Blocklist.org, lists are built custom just for you.
Note: Blocklist.org is under a lot of pressure. We are trying to fix it ASAP but until then if you get errors while updating you can add the lists from Methlabs Sync.
http://peerguardian.methlabs.org/pg2.html
* I'm testing this out myself...sitting in the background it is only taking up 0.7M of memory and 0% CPU for me