OK It's my turn to beg, I need some help please,

I have a system at the house (IBM PIII 800, plenty of RAM). I installed Win XP SP2, now my Internet access (Cable Modem - diagnostics read normal) is slower than a 14:4 baud modem. (1:30 to open Google) I have tried the following: Disabled all firewalls, and pop-up blocking software, in depth scans for spyware and viruses, re-installed the NIC card, rolled back SP2, verified DNS entries, and I still have to wait forever to access any webpage.

Any Ideas forum - I don't want to hear reload the OS. I know that is an option, but I would rather not do that.

<edit> Internet Explorer Browser, and system fully patched prior to SP2 install.