XP-- Can't access internet

[tigerpilot]

All of a sudden I can't get online on one of my desktop machines. MB is a PCChips M863 
Something has changed in the XP OS.  Packets are being received but not sent out.  I installed XP on another drive and then everything works fine but I don't want to lose my desktop icons etc.
Is there anyway to repair the XP install or what is the best solution ?
I appreciate your help...

[smlh89450]

Can you be more specific?  When you click to open your Internet browser, what happens?

[tigerpilot]

Thanks for the reply...
When I try to open Firefox or Opera, I get "Can't find the server at ...........
In control panel (network connections)  the conection is "Connected" Duration is correct, Speed is 100 Mbps,.  Activity shows  35 packets sent and 0 received.
In properties, ALL items are checked.

There is an unusual Window on Start-up. 
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Mobile Devices Properties

The TCP/IP Network
transport is NOT installed.
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Hopefully this will give you some insight.
Thanks Again