Windows 7 Service Details
Microsoft's included firewall.
Windows Firewall helps protect your computer by preventing unauthorized users from gaining access to your computer through the Internet or a network.
Consequences of Stopping:
Disable it only if you have your own firewall. It offers you security from many forms of online attack. It's probably not the best firewall in the world, and won't protect you from everything, however, it is much safer than running without.
All services listed in 'Required For' will be unable to function