Unidentified Public Network & Invalid IP Address

[KyleLevell]

Hello. I have been using Windows 7 for about a month now and two days ago i started to have network problems.

I cannot connect to the internet or my network and keep getting messages saying that the network cable is unplugged when it is not. After a while i was able to get a different message and the computer connects to an unidentified network and when i troubleshoot this it tells me i have an invalid IP address.

I know the problem has got nothing to do with the hardware or my internet. I have tried 2 other router's & another modem with different ethenet cables with no luck but my network/internet is working fine on my laptop which is also Windows 7.

 

[logicearth]

What about switching out the NIC on the PC? Have you tried that?

 

[KyleLevell]

No i have not tried this as i don't have a second one. But i have uninstalled the drivers and re-installed them with no luck.

 

[Crypto]

May be your NIC is dead ? As you tried external devices which Should Word and if they failed that means your internal thing(NIC) may have the problem.

 

[Jacee]

Clear your DNS cache, see if that helps.

Open a command prompt....from the Start menu, select Run > In the box/"open field", enter cmd.exe
enter ipconfig /flushdns press 'enter'

 

[fseal]

Did you recently install adobe photoshop or CS?

Adobe products install a service called Bonjour that on W7 messes with the DNS in such a way as to create invalid entries in your gateway list causing this exact problem.

There is an article/thread on here about how to remove it. Sorry I don't have the info at my fingertips atm...

[Edit] Ooops, this doesn't sound the same actually, Never mind!

(Here is the thread anyway)

http://www.sevenforums.com/network-...e-no-network-access-unidentified-network.html

 

[KyleLevell]

It started working about 30 minutes ago but stopped working again after about 10 minutes so dunno wether it can be the NIC.

I have tried Clearing my Cache to with no luck.

I actually installed Adobe Photoshop & Dreamweaver about a week ago but i think i unselected Bonjour to be installed with it and i cannot find it in my services list either.

 

[KyleLevell]

I did IPCONFIG/ ALL in CMD and this is what it told me.

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : Kyle-PC
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 . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
Physical Address. . . . . . . . . : 00-12-3F-75-DC-0F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{9D965381-3014-4C61-8EDD-5014E98C1EC9}:

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

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Windows\system32>

 

[zigzag3143]

KL

You know if thats all of what ipconfig gave you then all three sections are off. What method do you use to connect wired, or wifi?

You are missing this section
Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : hvc.rr.com
Description . . . . . . . . . . . : Dell Wireless 1390 WLAN Mini-Card
Physical Address. . . . . . . . . : 00-1A-92-42-2D-90
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::c596:d81a:74a:c43f%13(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.102(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, August 31, 2009 7:31:55 AM
Lease Expires . . . . . . . . . . : Tuesday, September 01, 2009 7:31:53 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 218110610
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-11-D4-4A-07-00-15-C5-76-D6-03

Ken

 

[KyleLevell]

My desktop computer is connected to my router which is connected to my modem and my laptop & xbox 360 connects wirelessly to the router.

 

[zigzag3143]

My desktop computer is connected to my router which is connected to my modem and my laptop & xbox 360 connects wirelessly to the router.

so the unidentified network is on the laptop right?

Ken

 

[KyleLevell]

The IPCONFIG i uploaded before was the one that displays when it tells me the network cable is unplugged. I got it to the stage where it displays being connected to an Unidentified Public Network and this is what the IPCONFIG says now.

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfig /all

Windows IP Configuration

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

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
Physical Address. . . . . . . . . : 00-12-3F-75-DC-0F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::103f:59fa:6e8f:afaf%11(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.175.175(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 234885695
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-2D-F4-A0-00-12-3F-75-DC-0F

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{9D965381-3014-4C61-8EDD-5014E98C1EC9}:

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

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Windows\system32>

 

[KyleLevell]

The undefinied network is on the computer and the internet on my laptop and xbox 360 are working fine.

 

[sup3rsprt]

Try configuring an IP address manually.

 

[zigzag3143]

KL

Hey. the Ip address 169.254.175.175(Preferred) is a local IP of the nic. It usually results from a driver being corrupted or not installed. Does the nic have a link light and a data light (green, orange)? when the nic is working the link light should be on steady and the data light should blink when data is moving.

I would re-install the nic driver.

Ken

 

[KyleLevell]

I have tried doing the IP manually but it did not work.

How can i find out what NIC i have to re-install it and download drivers? Is the NIC my network adapter?

 

[zigzag3143]

yep nic=Network Interface Card listed in device manager right click network adpaters, and properties. if no yellow triangle on it and it says working properly it has to be something else

Ken

 

[logicearth]

KL

Hey. the Ip address 169.254.175.175(Preferred) is a local IP of the nic. It usually results from a driver being corrupted or not installed. Does the nic have a link light and a data light (green, orange)? when the nic is working the link light should be on steady and the data light should blink when data is moving.

I would re-install the nic driver.

Ken

Actually the 169.254.x.x IP range is for auto-configuration when it gets no IP from a DHCP server. There is no gateway set on the NIC configuration, there should be one. Try turning off third-party security software you might be running, if any.

 

[KyleLevell]

Yes there is nothing wrong with the NIC in device manager but it has 2 orange lights one stays on and the other flickers. I have switched of third-party security which has made no difference. The problem has actually changed, it now comes on when i restart the computer somtimes and stays on for about 30 minutes before going of again and saying it is connected to an unidentified public network.

 

[KyleLevell]

I have checked event viewer and i have noticed these messages.

Adapter Intel(R) PRO/100 VE Network Connection: Adapter Link Down
Source: E100B
Event ID: 4
Level: Warning

And this one.

Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x00123F75DC0F. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Source: Microsoft-Windows-Dhcp-Client
Event ID: 1001
Task Category: Address Configuration State Event
Level: Error

Not sure if any of this has anything to do with to.