First, it would sure help if we knew the operating system of the computer in question.
Next, try running the free program below and see if it reinstalls the connection software:
Repairs Winsock 2 settings caused by buggy software or improperly removed internet software:
Hope this helps.
I have DSL with a router connecting to two computers. When I select one of the network connections and choose properties, it shows a check mark in the Internet Protocl (TCP/IP) box. The General tab under properties shows the same thing as my other connections: "Obtain an IP address automatically." But while the other two conntections work fine, the one to my main computer does not. It stopped working immediately after running a spyware program (from Yahoo!). I have gone under windows components and added the TCP/IP protocol as a subcomponent under networking services. When I click on "Repair" after right-clicking on the connection, it continues to give the message that TCP/IP is not installed. Any ideas on how to fix this?