One of my PC's won't work with my new Comcast Modem

[jaredmlaw]

Recently Comcast bought out all the TimeWarner cable service area in
the Twin Cities area. And yesterday the technicians installed a new
Comcast Motorola Cable Modem. The problem is that when the registration
disc is ran on one of my PC's (XP SP2, MSI Neo Platinum board with
built in gigabit ethernet, firewall turned off, virus turned off) it
says that I don't have a network adapter. Which seems weird that 5
minutes before when I still had Time Warner modem and service I was
fine and dandy and apparently my ethernet card was working fine. So I
have 1 other PC (win 2000 pro) still in my house and was able to get
that one running even though the little install disc said there was an
error.

I finally gave up and tried the modem through usb directly to my
computer and that didn't work.

This tower is my web development station and is kind of important that
I connect to the internet. Does anyone have any thoughts on what could
be going on? I have tried everything short of doing a wipe and install
of my entire system. Something that I don't want to do because setting
up IIS is a pain.

I spent an hour on the phone with a technician and that didn't help.

 

[BobC]

I finally gave up and tried the modem through usb directly to my
computer and that didn't work.

There is no need to install any comcast software on your computers to
connect to comcast. In fact their software often causes probems (see
comcast's user forums). If you are using the USB connection (not the
preferred way to network), you will need the USB drivers for the modem
installed.

If you have ethernet use that. You can only have one computer connected to
the cable modem. Whenever you change the computer connected to the modem,
you must power cycle the modem and computer in the proper sequence and
timing. Unplug the modem and computer. Wait several minutes. Plug in the
modem and wait for it to sync with comcast. Power up your computer.

You are best to get a router then you can use both computers on the
Internet at the same time and you won't need to go through this power
cycling routine whenever you want to use the other computer.

 

[jaredmlaw]

I have a router setup now, and everything works fine with my 2000 old
tower and my mac book pro, but for some reason my xp tower won't talk
back to the modem.

But the first thing that the technician did was hook the modem directly
to that pc via ethernet cord and get it to work and couldn't. So the
first computer that the modem connected to was the one that currently
doesn't work.

 

[Chuck]

I have a router setup now, and everything works fine with my 2000 old
tower and my mac book pro, but for some reason my xp tower won't talk
back to the modem.

But the first thing that the technician did was hook the modem directly
to that pc via ethernet cord and get it to work and couldn't. So the
first computer that the modem connected to was the one that currently
doesn't work.

Jared,

Do you have both the old tower (Windows 2000?), and Mac Book, connected to the
router and both getting Internet service? That's where you need to start.

As Bob says, don't run any software from Comcast. If they provided any, un
install it first, and restart the computer. Then, with all 3 computers
connected to the router, and the router connected to the modem, run "ipconfig
/all" (or the equivalent on the Mac Book if you can), and post the logs here.
<http://nitecruzr.blogspot.com/2005/05/reading-ipconfig-and-diagnosing.html>
http://nitecruzr.blogspot.com/2005/05/reading-ipconfig-and-diagnosing.html