Enables multi-party communication using Peer-to-Peer Grouping. Peer Name Resolution Protocol is a distributed and (mostly) serverless way to handle name resolution of clients with each other. In a high security environment, it is more secure to rely on centralized name resolution methods maintained by authorized staff. Default: Manual. Counter Measure: The recommended state for this setting is Disabled. Potential Impact: Some applications, such as HomeGroup, may not function. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services\Peer Networking Grouping (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\p2psvc!Start