I just got a wireless router, and am having this annoying problem.

Ok so here's my setup. My DSL modem is connected to my router, which is then connect via ethernet to my desktop. Everything works fine, I can connect to the wireless with my laptop, and my desktop connects to the net too.

My problem is every so often I won't be connecting properly to net on my desktop computer. After investigation, I've discovered that if I go to my task manager and under processes there are two versions of "svchost.exe" running, one with a user name of 'network service' and the other 'local area network'. If I manually end these two processes, I can connect to the net fine, so its bascially those two things that are messing me up. Every so often (I can't determine the trigger) they'll start up again and I can't connect.

I think the problem is in my internet settings, in that before my desktop was connected to the modem and was dialing out, whereas now the router does that and Im just connected via LAN. I've tried deleting all my old internet connections, and reinstalled my firewall but it still happens. What I need to do is prevent those instances of 'svchost.exe.' from starting up. This is all on windows XP

Any ideas what I should be doing?