Unable to connect using TCPIP

I'm not able to connect to internet or to any internal terminal server, but i can ping internal and external computers, nslookup resolves name correctly (internal an internet).

I have Windows Vista Home Premium

I can't get pop3 email

Any suggestions
albertofresnilloAsked:
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troubleshooter141Commented:
can you ping external addresses by name or IP address?
For example try to ping yahoo.com
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albertofresnilloAuthor Commented:
Both, by name or IP Address i'm able to ping. DNS is working well.

I have disabled Windows Firewall to be sure it's not the cause of problem.

I have just removed Norton 360 and i installed avg free, im testing with norton removal tool to check if it is the reason of failure.
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albertofresnilloAuthor Commented:
Norton was the problem. Thanks
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