Windows 7 - "LAN doesn't have a valid IP Config"

I've been trying to solve this problem for days now.
Using Windows 7 64 bit
7 finally gave me this error to work with (after tiresome troubleshooting) but I don't know what this means or how to fix it. "LAN doesn't have a valid IP Config"

It's weird because I could use the net just fine with the RC 32bit, and also on my other XP OS's.

I use a cable modem. All the settings are set to detect automatically. (The settings are the same as all my other OS's) but this OS won't connect to the internet... and half the time it won't even connect to the Network..
When I reboot the modem or adapter it will often see the network temporarily and try to connect to the internet but then it keeps losing connection and then randomly connecting to network again..... Oh and when it does connect to the network, it says it's an "Unidentified Network" ??

It has even momentarily connected to the internet once or twice, but only momentarily...!

Can anyone PLEASE help me to resolve this. I've checked tutorials and other posts, but I haven't found any help that way.
Thank you

Open a command prompt. Copy and paste:
ipconfig /allcompartments /all
Hit enter. Please post a screenshot so us wonderful people here at Sevenforums.com can help you.

OK, here is the screen shot!

http://i10.photobucket.com/albums/a1...n/ipconfig.jpg

My thought is that your driver for your ethernet card isn't right. You got a 169.x.x.x internet address which is self-generated because your machine can't get to the DHCP server (at your cable ISP) to get a proper 198.162.x.x local address. If it used to work, then it's either the 64 bit driver for your NIC card, or the physical ethernet wire to the cable modem.

Ok, well I know its not the cable because I was using the internet on my other OS on the same PC.
is it the "Marvel Yukon 88E8001/8003/8010 PCI Gibabit" that I need to update?

*guess so...

Ok, I found the source: Marvell: Drive Search Results

I dl'd these drivers and i'll go try to install them. hope it works. thanks for your help. if you have anything else to add please do. I'll be back with an update.

Well, it hasn't fixed it....

if you go to the Marvell website above (now linked below), u will see 2 driver updates. Only one (1), however, seems to be an installer... the other (2) contains files like a .dll n others, but clicking on all of them produces nothing.. just opens up some applications that I can't do anything with- won't install anything... (see attached for a dl of this #2)
And its this one (2) that seems, based on the description, to be the more important one of the two. the one that installed (1) didn't even have windows 7 in the description..

(1) W2000/WXP/2003/Vista/Win x86 and x64 Multi-Language Installer (32- and 64-bit) for Yukon Devices

(2) Windows 7 & Server 2008 R2 x64 (64-bit)

My pc is still telling me that the LAN doesn't have a valid IP config...
Please, any more suggestions would be great. Thanks

Well, for anyone that cares...

I solved my problem:

I tried using the command prompt to do something Dinesh suggested in another post:
1: Release and renew ip address.
ipconfig /release and ipconfig /renew in an elevated command prompt.
2: clear the winsock catalog by netsh winsock reset calatog command.

ipconfig /renew kept saying "An error occurred while renewing interface LAN : unable to contact you DHCP server. request has timed out"

What fixed everything was this: (I can't find the author atm sorry):
Under LAN Status > Properties > Uncheck "Internet Protocol V6" I guess this v6 doesn't work with Windows 7 or 64 bit? anyway thats what worked for me. Very happy now!

nevermind... that fixed, but only for a few minutes, and then somehow it decided to screw the connection.

I'm still getting "LAN doesn't have a valid IP config" and
"An error occurred while renewing interface LAN : unable to contact you DHCP server. request has timed out" (cmd > ipconfig /renew)

Any suggestions for this?

This is Crazy! Now its showing that I'm connected to the internet, but it won't give me access to it when I open IE or Firefox. Nor will perform windows update!! Even though it says I'm connected!
And, it keeps going in and out of connectivity, even back and forth from Identified network to Unidentified network... randomly!

If you guys haven't been helping me because you think I didn't look hard enough on the forums for an answer, then please help me now because I have read through multiple long troubleshooting threads and tried everything that might have been applicable... and it's gotten me to here- random ghost access to internet!

I would appreciate any help. Thanks!