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Solved: Computer suddenly lost internet connection


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20-Mar-2012, 11:30 PM #1
Solved: Computer suddenly lost internet connection
My family's main computer, a 4-year-old Dell Inspiron desktop, suddenly lost its internet connection today. The computer is directly connected to a Medialink wireless router hooked up to the modem because the computer lacks wireless capability. The router is working just fine, as we still have our wireless network and can connect to the internet from every other device in the house. The modem is working (a bit obvious). Network and Sharing Center claims to have local connection, but I'm not so sure - I can't access the router settings from a browser, which I'm sure I can do without an internet connection. I take this to mean the computer can't communicate with the router, so I tried swapping out the cable without luck. I also tried using a different port on the router.

I still need to test the router ports by connecting my laptop to the router, but I'm guessing this isn't the problem. Could the problem be the computer's network card?

In the meantime, I'm trying to use a Medialink USB wireless adapter that I actually bought to use with an old Linux desktop. It works fine with Linux and installed perfectly with Windows XP, but for the life of me I can't get the driver to install with Vista. This isn't exactly relevant to my original question, but if anyone has experience with a similar issue, advice would be greatly appreciated here as well.

Edit: I did finally get the driver installed, although it took no less than 10 attempts. Now to make it play nicely with McAfee...

Edit 2: Just to confirm, I tested the router with my laptop and the cable/ports are working. Since no network settings had been changed on the desktop computer, I'm still suspecting the network card, but I'd like someone to confirm my suspicions with some sort of test.

Edit 3: I booted an Ubuntu Live CD to see if I could connect via ethernet, and I can, so it isn't the network card. I'd already looked at the network settings to see if anything caught my eye, but I didn't notice that anything had changed. Any ideas? Are there any command prompt commands I can run to try to pinpoint the problem with the ethernet connection?

Last edited by tkdchick218; 21-Mar-2012 at 11:16 AM..
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21-Mar-2012, 08:09 AM #2
Click Start > Programs > Accessories > right-click on Command Prompt, select "Run as Administrator" to open a command prompt.

In the Command Prompt, type in the bold text, one command after the other, pressing Enter between each one of them:

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults: netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults: netsh int ipv6 reset reset.log

Restart the computer.
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21-Mar-2012, 11:14 AM #3
Thanks for the advice, I need to write that down somewhere so I remember to try it next time.

I shut down the computer overnight while I slept, and when I booted it this morning the ethernet worked. I still have no idea what was wrong or how it fixed itself, but at least the problem is solved (for now, anyway).
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21-Mar-2012, 11:16 AM #4
Well, often, a computer restart is all it takes.
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21-Mar-2012, 11:37 AM #5
Restarting it was the first thing I tried when I noticed the problem, and it had been restarted several times after that while I was attempting to install the adapter driver (including a couple of boots into safe mode with networking). I don't know why leaving it shut down overnight helped, though.
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28-Mar-2012, 11:30 PM #6
Phantom010, you are my hero today. Thanks for the solution to my problem that has been driving me crazy for days. Just thought you should know you made a person happy today.
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29-Mar-2012, 08:02 AM #7
Glad you got your problem fixed!
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Tags
adapter, internet, network card, router, vista

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