vista can not access internet

How is your computer getting its IP address and DNS settings?

If you are connected directly to the web via a cable/dsl modem, then you should get the DNS settings from your ISP's service.

If you are using a router, or connected through some type of LAN, make sure the IP provider is handing-out a valid DNS server address. Try Google's DNS server, 8.8.4.4

Firebar,
I have the dns set to 8.8.8.8
I can ping 8.8.8.8 from the command prompt, but can not ping www.yahoo.com
the ip address is delivered by my router.  Ipconfig show a good address, gateway and the dns I set.  I have other computers on the same network and they all work fine.

Try flushing the cache.

1. Click the Microsoft Vista Start logo in the bottom left corner of the screen
2. Click All Programs
3. Click Accessories
4. RIGHT-click on Command Prompt
5. Select Run As Administrator
6. In the command window type the following and then hit enter: ipconfig /flushdns

I am using below DNS Server, which work perfectly fine without any issues.
Primary DNS Server:      8.8.8.8
Secondary DNS Server:      4.2.2.2

Also please check whether there any firewall is on for your PC. Disable Windows Firewall service and see if things changes. Also see if AV on your PC is blocking access by any chance.

Try to do ipconfig /flushdns as well.

Yep...tried that also.  I'm running a full malware scan right now.  so far nothing has shown up.
I also am planning on installing SP2 as soon as scan is finished.  Another clue...the computer also has a wireless card and the results are the same.  Connects local and no internet.
Oh my....

All firewalls are off and AV service is turned off.  
Weird one huh?

I would get SP2 on the machine ASAP.

DNS Client service is in started state?

DNS is started....I did a restart.  Wait for scan to complete for a restart.  should be soon.  I'll post back then.  
Thanks for the help so far.....we will GET IT !

Also, let's focus on one connection. Windows acts weird when two NICs are present and functioning on a non-server OS.

Go to device manager. Remove NIC from there. Simply right click and then remove. If possible do a reboot of the PC and then see whether your PC detects the card again. This should refresh all the IP settings on your PC. If you got DHCP let IP get assinged automatically, if not assign the set of IP address and see if things change.

If possible keep only one NIC active.

I'll disable the wireless and remove the nic before the restart.

nslookup resolves fine.  IPv6 is disabled.  I am installed Sp2 now.

Service Pack installation should solve this.

Check this out

http://support.microsoft.com/kb/938248

Last link which I gave have suggested to have SP installed or have the Hotfix installed.
In above article they have mentioned about some manual config changes. I would suggest to have registry backup first before doing this change.

To work around this problem, manually set the node type in the client computer's registry. To do this, follow these steps:
Click Start, type regedit in the Start Search box, and then press ENTER.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netbt\Parameters
On the Edit menu, point to New, and then click DWORD Value.
Type NodeType, and then press ENTER.
Right-click NodeType, and then click Modify.
In the Value data box, type the desired value, and then click OK.

Note To use P-node name resolution, set this value to 2.
Exit Registry Editor.

opps...sp2 would not install.  After 20 min it says it did not install and reverting changes!  
getting weirder.