Dell PC doesnt recognize wired enet - works on other computers

[wheel90]

Okay. I have a dandy that Dell couldn't fix. I can't get my Windows 7 Professional Dell system to recognize a wired e'net connection. I know the cable is okay because I can connect it to my Windows 8 Toshiba laptop next to my desktop and it works great. On my Dell tower, I just get a message that a cable isn't connected. Dell came out and replaced the port. Didn't fix it. I completed uninstalled the drivers and reinstalled them. Didn't fix it. I inserted a separate gigabit eNet card and drivers. That didn't work either. (by the way, the green light comes on the back of the card so it's obviously making a physical connection. I have reset and restarted my router, tried different physical ports and cables, and unplugged my OOMA telco device to make sure that wasn't interfering. Windows troubleshooters are useless. I have a combination router/modem from Time Warner, which is what I'm blaming - Arris DG1670A. Could there be some sort of port restriction or conflict that I'm having on my desktop? This is something that I'm not versed in fixing or diagnosing, so pointers are appreciated.

 

[wheel90]

Addtitional data. I'm using Windows Firewall. AVG Anti-Virus. Here's the ipconfig info


Windows IP Configuration

Host Name . . . . . . . . . . . . : CSMC-WORK
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Gigabit PCI Express Network Adapter
Physical Address. . . . . . . . . : F8-B1-56-D2-A1-14
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 10-08-B1-FB-17-B8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Dell Wireless 1703 802.11b/g/n (2.4GHz)
Physical Address. . . . . . . . . : 10-08-B1-FB-17-B7
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2606:a000:4525:5e00:5546:775f:523c:e411(Preferred)
Temporary IPv6 Address. . . . . . : 2606:a000:4525:5e00:57e:e9c5:75bd:a3fc(Preferred)
Link-local IPv6 Address . . . . . : fe80::5546:775f:523c:e411%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, July 04, 2015 12:30:14 PM
Lease Expires . . . . . . . . . . : Saturday, July 04, 2015 3:00:14 PM
Default Gateway . . . . . . . . . : fe80::aeb3:13ff:fe77:3057%11
192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 219154609
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-1D-DE-CB-10-08-B1-FB-17-B7
DNS Servers . . . . . . . . . . . : 209.18.47.61
209.18.47.62
NetBIOS over Tcpip. . . . . . . . : Enabled

 

[Mayank Parmar]

Did you try to mount the Ethernet card in a different PCI slot?

 

[torchwood]

modem confiiguration

Have a look at your modems configureation

In your browser type 192.168.0.1, it should then connect to router,
you will have to enter the ID/password to get to the various settings, unless you've changed it standard password is admin, have a look to see if it is actually set for both E'net and wifi.

Roy

 

[GokAy]

try run in cmd (restart after running both):
netsh winsock reset
netsh int tcp reset

Also boot into Safe Mode with Networking and see if it works there.