The message that it is has no network adapter and not configured. What's wrong???

I have a Gateway LX6810 - 01 desktop runnning windows Vista Edition Albums Home Premium, 64 bit, 8 GB of RAM, all the latest updates and Service Pack 2. I connect to the internet through the network connection AT & T Uverse high-speed broadband (12gbps). He worked for over two years now with no problems until now. All of a sudden one day after I rebooted the machine there is no internet connection. When I went to the network and sharing Center, I receive a message that there is no installed network devices. SO, I went to the Device Manager window and there is no device listed network but when I opened the "hidden devices" he has been. (Why it is hidden I have not the slightest idea). SO, I went to the BIOS and checked for if ensure the LAN has been "activated" and it WAS.  I don't always get the same message "no network installed devices. SO then I went on the website gateway and downloaded the driver LAN for my machine and my LAN and reinstalled the driver... I ALWAYS get the same message and I still have no Internet connetion. WHAT could be the problem? Although I consider myself relatively smart, I'm NOT a computer guru, so be kind and state your suggestions in the jargon of the 'no' then I'll understand. Thanks for your help. I'm out of ideas.

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Hello

Thanks for posting the request in the Microsoft community!

I understand that you receive the error "no network listed device" on the Device Manager window and you don't have an Internet connection. We will try to solve this problem by following the suggestions.

1. don't you make changes on the computer before the show?
2. What is the exact error message that you receive when you try to connect to the Internet?
3. what anti-virus software is installed on the computer?

To resolve the connection problem, try suggestions

Method 1:
Try the steps in the link and check.
Windows wireless and wired network connection problems
http://Windows.Microsoft.com/en-us/Windows/help/wired-and-wireless-network-connection-problems-in-Windows

Method 2:
Temporarily disable the antivirus and firewall installed on the computer and check.

Enable or disable Windows Firewall
http://Windows.Microsoft.com/en-us/Windows-Vista/turn-Windows-Firewall-on-or-off

NOTE: turning off Windows Firewall may make your computer (and your network, if you have one) more vulnerable to damage caused by worms or hackers.
You can see the following link to disable the Antivirus installed on your computer software.

Disable the anti-virus software
http://Windows.Microsoft.com/en-us/Windows-Vista/disable-antivirus-software

NOTE: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you should not disable your antivirus software. If you need to disable temporarily to install other software, you must reactivate as soon as you are finished. If you are connected to the Internet or a network, while your antivirus software is disabled, your computer is vulnerable to attacks

Method 3:
If the steps above do not help, you can reset the TCP/IP stack. To reset access the link below and either click on "Fix it for me" or follow the instructions to fix it yourself: http

Method 4:
You can uninstall and reinstall the network card and check.
a. Click Start, type device manager in the search box of start and press ENTER.
b. Locate the network adapters and expand the same.
c. Select the wireless connection, right click and choose uninstall.
d. restart the computer, if prompted.
You can download the network drivers update of the website of the manufacturer of the system and check:

Method 5:
If you use Internet Explorer, then you can read the following article and try the suggestions and check.

How to troubleshoot network connectivity problems in Internet Explorer

http://support.Microsoft.com/kb/936211

Please follow the recommended steps and post if you still experience the problem.  I'd be happy to help you further.

Tags: Windows

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