Blocking IPv6 broadcast

Hi, I have a customer connected to my Cisco 3560 switch via Gigabit Ethernet, recently I noticed that he is broadcasting IPv6 packets such as LLMNR, DHCPv6 and ICMPv6 it seems that the customer is connecting a Vista machine that has some IPv6 services enabled (some IPv6 services are enabled by default on Vista) How can I block such broadcast from entering my network? By the way there is no firewall in this setup, just a switch to switch. BR Sharef