Why would the Default Gateway constantly require resetting?

Posted by Raven Dreamer on Super User See other posts from Super User or by Raven Dreamer
Published on 2012-09-26T01:14:40Z Indexed on 2012/09/26 3:40 UTC
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windows-7

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internet-connection

I've had a (mostly) steady internet connection for the past two months. For the last hour, however, my connectivity has been dropping every 10 minutes or so, and must be reset.

So far, I've always been able to fix the issue by running Windows network diagnostics (On Windows 7 64 bit), but the lack of constant internet is making it a pain to try and stream video, download games through steam, etc.

Windows always reports a fix by "Resetting the Local Area Connector", telling me: Default Gateway Not Available.

What's going on? Is the trouble on my end, or with my ISP? (Timewarner Cable)

Things I've Tried:

Reinstalling the motherboard's LAN drivers
Manually setting a default gateway (gets cleared, reverts to default settings)
Unplugged (Hard Reset) the router
Unplugged / replugged ethernet cable.

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