inabilty sudden to connect to any network

My second laptop to vista SP2 will be no longer connect to the internet via any network - have tried wireless and LAN, secured and unsecured.

It will connect to the network itself, but nothing else - cannot ping other IP address on the network, DNS servers, etc.  Also, I can not connect to host IP of the router to set the parameters.

No configuration changes lately, regular mcafee and up-to-date analysis.  I left a night scan with an auto-stop last night, have had connection since the turn it back on after that problem.

I tried the factory reset default on my primary network, did not help.  When I restored the security settings, I enabled MAC controls and typed the physical address of the wireless router, did not help.  Also, I tried not secure networks in my area that I used before troubleshooting, but get the same results.  Another computer works normally on all networks.

I guess that's a problem with the networking or security settings, but diagnosis/repair tools just told me that they detected a problem that cannot be repaired automaticallys.  Disabling the firewall did not help either.

What else should I try?

Hello

  • Your computer is on a domain network?

Follow these methods and check if that helps:

Method 1:

I suggest you to follow the steps in troubleshooting section and check if it helps.

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:

Try to disable all anti-virus temporarily and check if it works:

Disable the anti-virus software

http://Windows.Microsoft.com/en-us/Windows-Vista/disable-antivirus-software

Important 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:

Follow the steps in troubleshooting this article and check if that helps:

Network connection problems

http://Windows.Microsoft.com/en-us/Windows-Vista/troubleshoot-network-connection-problems

Tags: Windows

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