The TCP/IP Print Server service enables TCP/IP-based printing by using the Line Printer Daemon protocol. The TCP/IP Print Server service on the print server receives documents from native Line Printer Remote (LPR) utilities running on UNIX computers. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!TCP/IP Print Server (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Ipdsvc!Start