go to this link and get TCPView. Install it into its own folder cos you may find it worth keeping along with like troubleshooting gear.
Start it by dclicking the .exe. Now have a look and see what is using your connection.
http://www.microsoft.com/technet/sysinternals/networkingutilities.mspx [a source of very good stuff]
By the way, why do you have hp as a home address? Personally i would fix/remove all your R1 and R0 entries [with hijackthis]... but you may think otherwise.
-I do not think that your problem is spyware based, rather that an autostart pgm is trying to download updates. Or something like that.
For example you have a time synch auto start. XP with defaults already does that for you every time you connect to the web, or at least once per week.
So i would remove those R's, and run TCPView. Come back with what you find.