This service runs in session 0 and hosts the notification platform and connection provider which handles the connection between the device and WNS server. Windows Push Notification Services (WNS) is a mechanism to receive 3rd-party notifications and updates from the cloud/Internet. In a high security environment, external systems, especially those hosted outside the organization, should be prevented from having an impact on the secure workstations. Note: In the first two releases of Windows 10 (R1507 and R1511), the display name of this service was initially named Windows Push Notifications Service - but it was renamed to Windows Push Notifications System Service starting with Windows 10 R1607. Default: Automatic Counter Measure: The recommended state for this setting is Disabled. Potential Impact: Live Tiles and other features will not get live updates. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services\Windows Push Notifications System Service (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WpnService!Start