Make sure, your computer is set to obtain IP address automatically. 1. Go Start>Settings>Control Panel (Vista/7 users: Start>Control Panel) 2. Double click Network Connections (Vista/7 users: Network and Sharing Center) 3. Vista/7 users - From the list of tasks on the left, click Manage network connections. 4. For a wired network connection, right-click Local Area Connection, and then select Properties. For a wireless network connection, right-click Wireless Network Connection, and then select Properties. 5. From the General tab (Vista/7 users: Networking tab), click Internet Protocol (TCP/IP), make sure it is checked, and then click Properties 6. Click Obtain an IP Address Automatically, and then click OK. If that doesn't work... Turn off computer. Disconnect router, and modem from power source for 1 minute. At the same time disconnect ethernet cable as well. Reconnect everything. Restart computer. If that doesn't work, bypass router, and connect computer straight to the modem. If that doesn't work... Go Start>Run (Start search in Vista), type in: cmd Click OK (in Vista, while holding CTRL, and SHIFT, press Enter). In Command Prompt window, type in following commands, and hit Enter after each one: ipconfig /flushdns ipconfig /registerdns ipconfig /release ipconfig /renew net stop "dns client" net start "dns client" Restart computer. If that doesn't work... Go Start>Run (Start search in Vista), type in: cmd Click OK (in Vista, while holding CTRL, and SHIFT, press Enter). At Command Prompt, type in: netsh int ip reset reset.log Hit Enter. Type in: netsh winsock reset catalog Hit Enter. Restart computer. If that doesn't work... Download, install, and run WinSockFix: http://www.softpedia.com/get/Tweak/Network-Tweak/WinSockFix.shtml (doesn't work in Vista) Restart computer, and check again. If that doesn't work... Download Dial-A-Fix (DAF) (doesn't work in Vista): http://wiki.lunarsoft.net/wiki/Dial-a-fix#Mirrors.2Fdownload_locations.2C_and_articles Have XP CD available in case DAF needs a file. Likely not! Check all boxes on the screen (clear any restrictions if it shows any) Then click GO! When the entire page is finished click the HammerHead at bottom to go to the second DAF page. Here, one at a time, do the below: Reinstall BITS Reinstall Windows Firewall Repair Permissions Reset networking Watch for any File not found or other errors and make note as this may lead to the fix! Restart computer.