Otis granger, ""The Microsoft ISATAP device Inter Site Automatic Tunneling Address Protocol is used to help enterprises transition to an IPv6 infrastructure. The ISATAP adapter encapsulates IPv6 packets by using an IPv4 header. This functionality enables the client to transport IPv6 traffic over an IPv4 infrastructure. This approach lets organizations slowly migrate to an IPv6 infrastructure without having to spend excessive time and financial resources to convert to the new infrastructure. " It is just another IP internet layer protocol. You can safely disable it. Many browsers recommend this (disable) since it could slow down, or even causing issue with your internet connection, if the sites you visit cannot support this new layer protocol. To remove IPv6 and all of it's associated devices:
Go into the properties for each network adapter, wired and wireless, and either uncheck the box next to Internet Protocol 6 (TCP/IPv6), that will disable it, or select it and click uninstall, which will remove it off the computer. Then go into device manager and remove any 4to6 adapters, WUN miniport adapters, or ISATAP adapters. Then reboot your computer.