Use LAN Speed Test to determine the connection speed of your network. Acceptable speed for 100Mbps connection should range from 85Mbps to 100Mbps, and for 1000Mbps (Gigabit LAN) connection should range from 950Mbps to 1000Mbps.
Use GL Windows - Network Test on all computers in the network to simulate simultaneous posting of transactions. Run the test over a period of time to determine the reliability of the network and the server.
Process ExplorerUse Process Explorer to determine which currently running programs (e.g. viruses, trojans, spywares, etc.) are causing our systems to stop functioning or run slowly.