default gateway not available in windows 7

I have repeated the "Power Management" step some weeks ago and it had no effect on eliminating the problem.

Reading the above reply, I do not have the "Speed/Duplex Settings" showing up at that step. Below are my choices under Advanced Tab:

Adaptive Inter-frame Spacing                        Disabled

Enable PME                                                   Disabled

Flow Control                                                  Disabled

Gigabit Master Slave Mode                            Auto Detect

Interrupt Moderation                                     Enabled

Interrupt Moderation Rate                             Adaptive

IPv4 Checksum Offload                                Rx & Tx Enabled

Large Send Offload (IPv4)                            Enabled

Large Send Offload (IPV6)                            Enabled

Link Speed &. Duplex                                   Auto Negotiation

Locally Administered Address                       Not Present Checked

Log Link State Event                                     Enabled

Priority & VLAN                                           Priority & VLAN Enabled

Receive Buffers                                             256

System Idle Power Saver                               Disabled

TCP Checksum Offload (IPv4)                      Rx & Tx Enabled

TCP Checksum Offload (IPV6)                     Rx & Tx Enabled

Transmit Buffers                                           512           

UDP Checksum Offload (IPv4)                     Rx & Tx Enabled

UDP Checksum Offload (IPV6)                     Rx & Tx Enabled

Wait for link                                                  Auto Detect

Hope this helps the detective work

I just loaded Windows 7 last night (finally had Vista 64 dialed and was hesitant to make the change....hehehe!) and ran into this internet issue and then spent hours researching to try and figure out the scoop and try different things to troubleshoot it. 

I believe I have found a way to fix the issue!!!!  :)

For me, it was resolved by......

1.   Click on new little network icon in lower right corner of screen which will which will cause a little popup showing that you are/aren't currently connected to the web, but that doesn't matter.

2.   Then click on "Open Network and Sharing Center" which should be in BLUE at the bottom of this little popup (there are many ways to get into this area, but I'm trying to make it as easy as possibly for non-techy types.  Another way is Control Panel/Device Manager/Network Adapters/etc..., but I digress!).

3.   Once you have clicked on the Open Network and Sharing Center, it will open...you guessed it...the Network and Sharing Center!  Just above mid-screen on the right side next to where it says "Connections", you will see in BLUE "Local Area Connection"....click this.

4.   Now at the bottom, click "Properties"

5.   Now click "Configure" towards the top right of the screen.  (On my screen, I'm going to be configuring the NVidia nForce driver.)

6.   Now click on the "Advanced" tab at the top and you should see a drop-down menu in the middle of the screen.

7.   Drop this down to where it says "Speed/Duplex Settings" and click on that.  With that selected, you can now go to the drop down menu for the settings for "Speed/Duplex Settings" to the right and drop that menu down to "100 MB Full Duplex".

***8.  I also went to the "Power Management" tab at the top (to the right of the "Advanced" tab you clicked earlier.) and toggled off "Allow computer to turn off this device to save power" as it seemed logical that I didn't want it to turn off this device ever to me.  I don't think this is necessary, but since it seems to be working now, why push it..hehehe!

That's it!  Problem has not come back.   For me, it seemed to primarily happen if there was a lot of traffic (as in downloading a large file or two). 

Hope this helps.  I know how frustrating it can be to not have your little computer buddy working properly, but I have yet to see software come out from anyone with zero flaws.  You always need minor tweaks.   You put out millions of products to work with 10x that many differing computer builds/setups and there are going to be "one off" issues.  Painful when WE are the one offs, but that's life.  

No I don't work for Microsoft.   I'm just a realist.  ;)

Good luck!!

I have been following this thread and using the suggested fixes (ie; bonjour) without success, having the same problem whereby I lose my connection due to a default gateway problem.

I do not have nvidia or bonjour and I lose my connection about once per hour. I purchased this machine native with Windows 7, so no upgrade paths or issues exist. Use it as it came out of the box.

Network adapter Local Area Connection driver information:

Description . . . . . . . . . . : Intel(R) 82578DC Gigabit Network Connection

Manufacturer . . . . . . . . . : Intel

Provider . . . . . . . . . . . : Intel

Version . . . . . . . . . . . : 11.0.41.0

Inf File Name . . . . . . . . . : C:\Windows\INF\oem2.inf

Inf File Date . . . . . . . . . : Monday, June 22, 2009 3:05:28 PM

Section Name . . . . . . . . . : E10F0.6.1.1

Hardware ID . . . . . . . . . . : pci\ven_8086&dev_10f0

Instance Status Flags . . . . . : 0x180200a

Device Manager Status Code . . : 0

IfType . . . . . . . . . . . . : 6

Physical Media Type . . . . . . : 14

Issues found

The default gateway is not available Fixed

Reset the "Local Area Connection" adapter Completed

Intel® Desktop Board  DP55WB

Intel® Integrated 10/100/1000 Ethernet Intel® 82567LF

Above are some of the specs I've seen posted that relate to my machine. Any suggestions on this configuration to fix this problem?

It's built in to the motherboard.

Atheros L1 Gigabit Ethernet 10/100/1000Base-T Controller