you can't uninstall internet protocol on windows xp
try ipconfig /renew from a dos prompt, and if it gives you the error
"an operation was attempted on something that is not a socket" have a look at this:
http://support.microsoft.com/default...b;en-us;817571
NB- if you have Service Pack 2 installed you can using the following from a command prompt to do the same as the article states for you:
netsh winsock reset catalog