IM Lock Enterprise
IM Lock Enterprise controls and blocks access to Instant Messaging and peer to peer services that waste time and compromise computer security. Free trial version available - sets up in less than a minute. Blocks all popular services: MSN Messenger, Yahoo Messenger, ICQ, AIM, Skype, eMule, iTunes, and many more. Also controls web browsing. IMterrupt is continually updated to detect and block new programs as they are released. Easy setup and admin.