If your network works but works slowly, you can try to determine the reason by using the Windows Performance monitor tool. The Performance Monitor can display utilization statistics collected from your network card and its drivers. You must first install the Network Monitor Driver to enable the collection of network driver performance statistics. Do so on the most-used computer on your network:
In Network and Dial-Up Connections, open Local Area Connections, and select Properties.
Select Install, choose Protocol, and select the Network Monitor Driver.
Click OK to close the Properties dialog.