Sudden loss of internet connectivity

Two days ago I lost internet connectivity suddenly on my desktop (Dell XPS 630i, onboard Nvidia network controller, running windows 7 Home Premium 64bit) and have been unable to restore it. As my laptop (winXP sp3) can still connect to the internet and the router settings have not been changed (Dlink DGL4500), I'm making the assuption that my networking problem resides on my desktop alone. the network adapter gives me a 'limited connectivity' symbol and refuses to connect to my network, even though the router acknowledges the desktop's wired connection. The troubleshooting diagnostic sometimes finds nothing, sometimes finds that the computer is not obtaining a proper IP, and sometimes claims the problem is the router. I've also disabled windows firewall. Throughout this whole process I have been getting a 'Drive Power State Failure' BSOD during restarts (about once every four or five restarts, not consistently). At first I was unable to replace the drivers or uninstall the adapter through device manager. After reinstalling the drivers using the Nforce 650SLI drivers on their website, I was able to do this, but this did not solve the problem. I also did a windows restore to before the problem occured, also with no luck. I've been through the event log and there are numerous code 5007 errors, which just tell me that the adapter timed out during an operation. I've also read through some forums online and tried several solutions including adding a DhcpConnBcastFlagToggle line into the registry: SOLVED: Network Icon Exclamation: No Internet

Finally I performed a fresh install of windows 7 but this too failed. What am I missing? My next thought is that the hardware needs replaced.

Thank you for taking a look at this.

The DGL-4500 works cause I looked it up becuase I have the DGL-4300 and it works beautifully.

I would defintily put your computers into static IPs

go to your support.dell.com

look at your service tag and see if you can update the latest drivers from your manufature's website.

have you tried a different port on the router also try to reboot the router internally

If all else fails... do a factory reset on the router... if your not quite sure how to do it through the web browswer...

there is a tiny ass little hole in the back of the router that saids "reset" you need a bobby pin just to put it in... hold for 10 seconds.... usually that is your last resort.

No good. Sharing center stalls at 'identifying' and finally accepts the router as an unidentified network with no network or internet access.

It looks like you checked out everything pretty well. Have you tried to clear the cmos on the board?

That worked! I should have thought of that. Thanks so much! any idea why this happened in the first place? I'd like to prevent it from happening again.

bigs2482 said:

That worked! I should have thought of that. Thanks so much! any idea why this happened in the first place? I'd like to prevent it from happening again.

what worked to solve it for you?

bigs2482 said:

That worked! I should have thought of that. Thanks so much! any idea why this happened in the first place? I'd like to prevent it from happening again.

All it takes is one bit of static electricity or a million other problems can cause your board to mess up the bios.

I have fixed network adaptor problems countless times by clearing the cmos. It's just one of those things that happens from time to time.

Once again the chev's advice proves to be useful, either that or I'm the luckiest guesser on the planet.

Clearing the cmos has worked so many times for about a million problems. Us overclockers use it all the time when things get messed up.

I have exactly the same issue as the OP and have tried the other options. I am now left with the clearing CMOS option. Will a soft reset through the BIOS panel do the trick? I ask because it's a laptop and disassembly is non-trivial!