Manages authentication, authorization, auditing, and accounting for virtual private network (VPN), dial-up, 802.1x wireless or Ethernet switch connection attempts sent by access servers that are compatible with the IETF RADIUS protocol. If this service is stopped, users might be unable to obtain a VPN, dial-up, wireless, or Ethernet connection to the network. If this service is disabled any services that explicitly depend on it will fail to start. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Network Policy Server (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\ias!Start