Connecting to Comcast cable modem still nada

Tonight I tried entering the MAC manually. Nada. I tried:
Temporarily disabled Windows firewall - nada
Reset Winsock, IPv4 TCP/IP, IPv6 TCP/IP stacks - nada
Clean boot - nada
Safe mode with networking (when I could finally get it into it) - nada

I power cycled the modem each time.

Had the modem MAC swithched to the Scientific Atlanta Docsis 2 - nada

Her connection works - I'm typing this on it.

Here is her ipconfig /all results:


Windows IP Configuration

Host Name . . . . . . . . . . . . : BettyHampton-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.tn.comcast.net.

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : hsd1.tn.comcast.net.
Description . . . . . . . . . . . : Intel(R) 82567V-2 Gigabit Network Connection
Physical Address. . . . . . . . . : 00-25-11-xx-xx-xx
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b9c1:4b12:786e:baa4%16(Preferred)
IPv4 Address. . . . . . . . . . . : 68.32.252.252(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Lease Obtained. . . . . . . . . . : Thursday, August 18, 2011 5:38:34 PM
Lease Expires . . . . . . . . . . : Thursday, August 18, 2011 6:18:49 PM
Default Gateway . . . . . . . . . : 68.32.252.1
DHCP Server . . . . . . . . . . . : 69.252.196.132
DHCPv6 IAID . . . . . . . . . . . : 268444945
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-65-0B-47-00-25-11-A5-C7-58
DNS Servers . . . . . . . . . . . : 68.87.68.166
68.87.74.166
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.hsd1.tn.comcast.net.:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : hsd1.tn.comcast.net.
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Connection-specific DNS Suffix . : hsd1.tn.comcast.net.
Description . . . . . . . . . . . : Microsoft 6to4 Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2002:4420:fcfc::4420:fcfc(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 68.87.68.166
68.87.74.166
NetBIOS over Tcpip. . . . . . . . : Disabled


And, the same from my Acer netbook (XP):



Windows IP Configuration


Host Name . . . . . . . . . . . . : AAO
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.tn.comcast.net.

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : hsd1.tn.comcast.net.
Description . . . . . . . . . . . : Realtek RTL8102/8103/8136 Family PCI-E FE NIC
Physical Address. . . . . . . . . : 00-23-8B-xx-xx-xx
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 68.32.253.52
Subnet Mask . . . . . . . . . . . : 255.255.252.0
IP Address. . . . . . . . . . . . : fe80::223:8bff:fe70:2e88%4
Default Gateway . . . . . . . . . : 68.32.252.1
DHCP Server . . . . . . . . . . . : 69.252.196.132
DNS Servers . . . . . . . . . . . : 68.87.68.166
68.87.74.166
fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
Lease Obtained. . . . . . . . . . : Thursday, August 18, 2011 6:31:02 PM
Lease Expires . . . . . . . . . . : Thursday, August 18, 2011 7:31:02 PM

Ethernet adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Atheros AR5007EG Wireless Network Adapter
Physical Address. . . . . . . . . : xx-xx-xx-xx-xx-xx

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : FF-FF-FF-FF-FF-FF-FF-FF
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : fe80::ffff:ffff:fffd%6
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Most confusing! I'm about ready to try a re-load of her OS from the recovery partition in a few days if I can't get it corrected soon. I don'tthink she has any programs installed, and I can back up her data to a USB.

After trying a total restore on her system, I left her my netbook so that she can check her email and Facebook, and took her Gateway home. I picked up a Netgear NIC at Staples on the way home, thinking that I would have to install it to fix the problem. Well, this is her Gateway that I'm on right now. I connected right up through my router, and then I connected directly to my cable modem. Think her modem(s) bad? It works fine with my netbook. Of course, something could have jiggled into contact on the 20 mile trip home with me. It is an onboard NIC, though. I don't see how that could happen. I might open it up just to check for anything loose.

Think Comcast is messing her up? Bad coax? I have a spare or two of those, also. I might take it back to her and install it when we take her home from church tomorrow. Somehow I don't think it will work on her modem, might take mine with me.

Nope I think that unless you are comparing apples to apples then I would follow-up on installing the alternate NIC you picked up (just to give you another shot at the prize when you take it back). The issue seems to be what will work with what, her nic in her computer at your house through your router to your ISP provided Device works but not at her house.... what's differernt, other than practically everything, from the cable you might be using through the fact that she isn't using a router... don't even know if the ISP provided devices are the same. So it's most likely an interoperability issue and I like the idea of adding the second NIC something you're sure is a bit more generic and mainstream and likely to have proper Win7 drivers and a broader list of other devices that it's likely to play well with, other than that I might try to convince her to pick up a router (identical you yours) save the money on the NIC and put it towards a router. It will give her a bit more versatility and scaleability and you won't be getting her something that she really doesn't need, since you've more or less proven that her NIC works (at least at your house) so if your router works with her Comcast device then you're golden.
Keep us posted, I'd like to hear how you ultimately manage to beat this problem.
Regards
Randy

Well, I was typing that last night going straight through my modem, not my router. I took her computer back today and hooked it up in her house - nothing. I also took my modem with me and hooked it up im place of hers. I could still connect up with my netbook (I was a bit surprised at that, but I guess my MAC showed OK in Comcast's database). I could not connect with her computer still, though. This totally eliminated the router as I was using hers without my router, just my modem and cable connection (still Comcast, but 20 miles away). I called Comcast, and they admitted that they had been upgrading systems in the area and might need to check on her headend equipment. They intimated that she might need a Docsis 3 modem, which I doubt since they are still slightly rare and only really needed - in the write-ups that I've found - to reach the highest speeds, which she isn't subscribing for anyway. Anyway, they are send a supervisor-level tech out tomorrow to check her service. If that doesn't get it, I might take my router over to see if that will get her on. This is a lady in her 80's, and she really only uses it for email and keeping up with family on Facebook. Thanks for all of the troubleshooting advice so far. I guess I'll be forced to learn Win 7 as our company is migrating to it as soon as they can find an installation that meets our security requirements. Our biggest problem will be getting our present software (which has a large investment) to operate with it.

Did you have a chance to try the other NIC that you purchased?

Originally Posted by Trouble

Did you have a chance to try the other NIC that you purchased?

No, since it worked so well with the on-board NIC (which has Win 7 drivers), I returned it unopened to Staples on my way home. They aren't far away, so I could always try that if Comcast doesn't succeed tomorrow. I can also take in my router to try, but I'd rather that she not have to buy any more equipment (I would buy the NIC for her if he needed it).

I'm not holding out much hope for comcast to solve the issue so you're likely to be back. You might want to take this intel driver with you just in case the gateway driver is less than optimal, I understand that it worked at your house, but it never hurts to have the latest and greatest and this one seems to be only about a month old.
Also assuming you haven't done it already, take another cat5 cable with you also, I know your XP netbook worked at her house as well, but it's worth a shot.
Additionally when you have her computer connected normally as it's suppose to be, can you ping anything? Like the default gateway, of the listed DNS servers or Google at 64.233.169.99, perhaps even a trace route just to see where it's failing.

I've already downloaded the latest Intel drivers for her NIC and burned a CD/tried them. They do include some nice new features, but not the one that I need - connecting her to Comcast. I've tried three Cat5 cables, no difference. Once the modem provisions, I can't even ping 192.168.100.1! I've tried all of the IP addresses in her ipconfig list, too. Nothing. I've tried setting the DNS to other "open" DNS addresses, but that didn't help either. I see eBay has lots of cheap wired routers listed, and if Comcast doesn't come through for her tomorrow and I can get her on with my router, I may just pick her up one of them.

Well, Comcast told her to take it to Best Buy to have it repaired. Funny it can get on at my house, but not hers. Anyway, I will try to take my router over to her house after work tomorrow. If that works I can always pick up a cheap wired-only router from eBay. If it doesn't, I'll go back to Staples for a NIC.

The words, I told you so, come to mind.
As a comcast customer myself, I've had my own experiences with them and their particular brand of support. But pretty much if the technician's laptop will connect, then you're pretty much on your own.
Likely to be a NIC -> Modem interop issue.
Does she have the same modem as your's at your place? I assume not since it worked at your place and doesn't at her's.
So possibly a generic mainstream NIC 10/100 maybe stay away from the Gigs.