Is your network connections folder empty?
First check the device manager. Load the drivers if necessary. You may see Ethernet Controller with an exclamation mark on it or a red X. Find the drivers disk or download the driver and load the driver.
No problems in the device manager?
Uninstall and reinstall the drivers. Reboot.
Check all of the network services under services.msc (Default services on Windows 7 can be found here – you may need to check all of the services)
Go to a command prompt as an administrator.
Still not there? Try this.
- Click Start , click Run , type regedit , and then press ENTER.
- Locate and then click the following registry subkey:
- Right-click this subkey, click Export , and then save the selected branch in a file.
- Click the Network subkey again, and then delete the Config entry. Do not delete the Network subkey. The Config entry should be reconstructed when you restart the computer.
- Restart the computer.
Still not there?
Go to a command prompt and type sfc /scannow
Ultimately you may need to backup your data and restore your computer.
Windows XP – Troubleshoot Here