I'm on XP. I think my TCPIP was deleted as well so I found this
To Reinstall TCP/IP
To do this you need a copy of nettcpip.inf. There is one on the Windows XP CD and there may be one on your hard drive at C:\WINDOWS\inf\nettcpip.inf. Note: To see the inf folder, open My Computer and go to the menu item Tools > Folder Options... > View > and choose Show hidden files and folders.
Right click "My Network Places" select Properties.
Right click the connection(s) and select Properties.
Click Install >Protocol >add >have disk.
Browse to the location of nettcpip.inf .
Select nettcpip.inf then click Open then OK then Internet Protocol (TCP/IP) then OK then Close
Reboot
I just tried it and my internet worked again. Just sharing.