Please verify that all your Network Services are Started.
Click on Start, type services.msc then press enter.
• COM+ Event System (for WZC issues)
• Computer Browser is set to manual
• DHCP Client
• DNS Client
• Network Connections
• Network Location Awareness
• Remote Procedure Call (RPC)
• TCP/IP Netbios helper
• Wired Autoconfig is set to manual(wired ethernet connections only).
• Wireless Zero Configuration ( XP wireless configurations only)
• WLAN AutoConfig ( Vista/7 wireless configurations only)
Also Download the latest Ethernet adapter card drivers
form the computer manufacturer's website if a branded computer or from the motherboard manufacturer's website if a custom build.
Also install all the drivers for your hardware not just chipset and Lan.