why not just edit the host file?
C:\WINDOWS\system32\drivers\etc\
or use the firewall
or use zonealarm
and mark the i.p. as untrusted
or like everyone said and just delete the file..
or Peer Guardian 2
for fun lets all see how much work we can make this.
using command prompt
Code:
TCPIP SET COMMUNICATION / REJECT=127.0.0.1