Found with google.com it will push the winsock settings back to normal.
As always, it's a first response before we dive any deeper into the issue. And I like that list you used.
I have 4 computers in my house. Recently, the main computer, that has the network (Linksys) and the DSL internet, will not connect to the internet. However, the other 3 will not. I have tried updating the modem and the network with drivers. I have run Spybot, Ad-aware, CleanUp, Ewido, and Norton. It is a Desktop running Windows XP. Any help would be greatly appreciated.