Hi,
- Have you made any software or hardware changes to your computer prior to this issue?
To work on the issue, refer these methods.
Method 1:
I suggest you run Network Troubleshooter and check whether the cause can be detected by the built-in application.
Access the below links for more information on Network Troubleshooter:
http://windows.microsoft.com/en-US/windows7/Using-the-Network-troubleshooter-in-Windows-7
http://windows.microsoft.com/en-US/windows7/Open-networking-troubleshooters
Method 2:
Obtain the information for the following question from the device manager.
Are there any yellow question marks in Device Manager? If yes what is the Device Error code?
http://windows.microsoft.com/en-us/windows7/Open-Device-Manager
To see Hidden Devices (Non Plug and Play Drivers) you will need to refer these steps.
a) Select View
b) Show Hidden Devices.
It is necessary to do this every time you open Device Manager if you need to see them.
Method 3:
How do I fix network adapter problems?http://windows.microsoft.com/en-US/windows7/fix-network-adapter-problems
Also refer these links.
‘Update a driver for hardware that isn't working properly’
http://windows.microsoft.com/en-US/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
You may also refer to the following link for more information.
‘Update drivers: recommended links’
http://windows.microsoft.com/en-US/windows7/Update-drivers-recommended-links
Further, you may refer to the following post that addresses a similar issue.
http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/df17c593-e78f-4878-97b0-7569307934c5
Refer only the suggestion provided by Novak Wu on January 28, 2010
Third Party Disclaimer:
Using Third Party Software or Link, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software or Link can
be solved. Using Third Party Software or Link is at your own risk.
Check if it helps.