New
#11
It's trivial to block skype at the router level. You need to block outgoing connections to ports 80 and 443, it apparently uses standard HTTP(S) traffic internally, and a peer to peer approach if available on the same network. It also deprives computers of all web access too.
A more realistic, and still trivial, option is to use Windows Firewall. Just add an outgoing rule, select skype.exe executable file, and deny the connection, so it can't even connect to anything.