Hi, thanks for your response. Sorry for the delay in mine. I'd actually posted on a few websites and I wanted to follow up with any new developments.
You're right, the older computer was running Windows XP Professional, and I did read that link that you sent regarding the broadcast flag - I will try that later, if I'm up to the challenge.
Well, let me give you an image of the network. There's the cable modem, which is an Arris combination Voice/Data Cable Modem supplied by Comcast Cable, connected directly into the ethernet port on the back of the Dell Inspiron 530s.
Running several ping tests and packet loss tests, my loss was above 40%. Comcast sent a technician out, but they said the modem was fine, and that the problem is with the computer itself.
I called Dell again that night, and they had me do a system restore and it restored it to the factory settings. Still no joy.
So, I was getting pretty angry at this point at both companies pointing the finger at each other. Although I was using only one computer right now, I decided to put the wireless router back into the network. For reference, it's a Vonage Motorola VT2442 VoIP/Wireless Router. I no longer have Vonage phone service, but I did purchase the router so I figured I'd continue using it.
What do you know. A quick powercycle of all attached devices, and the internet works. This makes me extremely angry at both Dell and Comcast for the blame game, but even moreso at Comcast because it proves that something's not right between the modem and the computer connection - and the computer itself is working fine.
At first I thought it was the MAC address not being recognized from the new ethernet card, or possibly that it was "locking on" to the previous MAC address of the router, but when I powercycled the modem, I was sure to remove the battery from the bottom as well, since many Voice/Data modems have a battery backup for 911 calls, etc.
Called Comcast and asked them if they could release the MAC from the modem because it's not recognizing the MAC of the new computer or something along those lines (Hardware MAC filtering) or to register the new computer MAC, and they said they weren't sure what to do for something like that.
I requested the call to be elevated to a higher level of support or to a supervisor and got the ol' "my supervisor will tell you the same thing I did" speech for a good 10 or 15 minutes.
I eventually gave up, the agent wore me down. The best part was when they asked me to stay on the line for a survey, and for once I was more than happy to. At the end of the automated portion of the survey, I was allowed to add any "comments" I'd like, and mentioned that after being a cable TV customer for 25 years, and a high-speed internet customer for over 12 years (@Home!) I would be actively pursuing changing my services to Verizon FIOS.
I'll try that DHCP broadcast thing you mentioned above, after I backup my registry. Unless anyone has any other suggestions on what I can do on my end I'd prefer to go without dealing with those knuckleheads again. But, if it's convoluted and complicated, I'll just leave the router in and turn off the antenna so my neighbors can't mooch.
Thanks again for your help. I'll post again after I try changing the Broadcast Flag.
Edited by pilot1226, 02 April 2009 - 11:20 AM.