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Windows 7 Thread, PC becomes unauthenticated on the network! in Technical; Hi All, Not sure this is in the right place... So, booting up the PC is fine, logging on to ...
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    Koldov's Avatar
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    PC becomes unauthenticated on the network!

    Hi All,

    Not sure this is in the right place...

    So, booting up the PC is fine, logging on to the network is fine. Everything is as it should be.

    I go back about half an hour later and see the exclamation mark on the network icon. Opening up 'Network and Sharing' shows that the PC is now 'Unauthenticated' what?!

    Clicking on the red X for troubleshooting resets the network adapter and the reason given for the failure is that the 'Default Gateway is unavailable - Fixed'.

    When I go back later it has become unauthenticated again.

    Only affecting this PC. Checked power saving on the adapter is off. Nothing I could see in the Event Viewer over that period, only complaints about Group Policy and Time Sync (due to no network).

    Any ideas?

    Kol.

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    Broadcom network card? Several versions of their card drivers were buggy and I saw this behavior on a few PC's, the version I stuck with was b57nd60x.sys v15.2.0.5 (dated 01/06/2012) and since then not seen it happen again.

    Of course, if it's not a Broadcom, please ignore...

    Andrew

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    ADMaster's Avatar
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    Are you using 802.1x authentication on the wire? If not try disabling the wired autoconfig service.

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    Koldov's Avatar
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    @AJWhite1970 - No it's an Intel pro chip.
    @ADMaster - Sorry, that's a little above my understanding, hope you can explain? I don't think any special config has been set up anywhere and the drivers are bog standard Windows ones I think. Maybe that's the problem...

    Kol.

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    ADMaster's Avatar
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    Hi Kol,
    You didnít mention wifi so I assumed this is on the wired network.
    It is typical to have computers authenticate when dealing with wireless, unless you have an open unsecured ssid.
    It is possible to have the same authentication setup on the wired network, but you would have to have the switches, and the PCís configured correctly.
    When I started testing some of these settings on my wired network last year, it is the only time I have seen authenticated / unauthenticated on the wired network adapter.

    Here is an MS page detailing how to enable 802.1x in windows, you can check the settings and do the reverse if they ware enabled.
    Enable 802.1X authentication - Windows Help

    I hope this helps,
    Cheers

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    Koldov's Avatar
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    Hmmmm...

    No @ADMaster, that's not enabled.

    However it hasn't become unauthenticated for a couple of hours now!

    Oh great, another intermittent fault to troubleshoot! I love those the most...

    Kol.

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    Maybe try updating the network drivers from Intel's site. Intel are pretty good at squashing bugs in each release, and they are a far sight better than the built in standard Windows drivers.

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    Joanne's Avatar
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    yeah I've had weird things from intel cards. Updating the driver usually fixes the issue. Windows update probably broke it!



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