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  1. #1
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    evilsatan's Avatar
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    Default Unidentified network in Windows 7, can't connect to the internet

    I am posting this because I have experienced two very similar cases in the past week so I am not sure if it is a Windows update or not, if it is perhaps someone else here has experienced it.

    Two different offices, two completely different PCs.

    Office 1:
    One PC would not connect to the internet over wired LAN, when set to DHCP it would obtain an incorrect IP config (169.x.x.x).
    When set to static IP it would connect to the gateway but not to the internet.
    WLAN card was fine and allowed a connection to the internet.
    Tried different cables, different ports on the switch, connected directly to the router, nothing helped.
    Cleaned registry, flushed DNS, updated NIC drivers, repaired the TCP/IP stack.
    I tried a few more things but stupidly didn't make a list :/
    Later that day it just started to work again, no reason for this.

    Office 2:
    Same as above but would not connect to the internet using wired or wireless (wireless is a PCI card so not integrated).
    Tried the same steps as above, disabled the Apple Bonjour service, installed the Reliable Multicast Protocol.
    Safe mode had the same problem, system restore did not help.


    In both cases all other devices in the office worked fine over wired or wireless. Has anyone else seen something like this? I am visiting Office 2 in the morning so will take cables, a replacement router etc. but everything indicates the PC is at fault and the fact the wired and wireless is playing up would indicate to me that there is a software fault/corruption preventing WAN access. Either that or a power surge could have damaged the components but everything else seems to be working fine.

    Cheers

    EDIT:
    To add, they use different security systems. Office 1 uses MBAM Pro with Eset Endpoint, Office 2 uses MSE (I just need to check it doesn't have McAfee enterprise installed but there is no reason why this would be installed). Both use iTunes so I will be trying to remove that as there was an update recently, not sure if they both installed it.
    Last edited by evilsatan; 2nd March 2014 at 07:07 PM.


  2. #2
    DF Jedi stimpy's Avatar
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    Default Re: Unidentified network in Windows 7, can't connect to the internet

    The only time I've ever experienced this is when the DHCP range is full. Check the capacity on the DHCP server and increase the address range.

  3. #3
    DF Super Moderator
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    Default Re: Unidentified network in Windows 7, can't connect to the internet

    Thing is it even happens when the IP config is manual on the client device with a valid and available IP address, rebooting the router doesn't help either.

    One router is a high end draytek, the other is a homehub2. In office 2 an identical PC connects fine on wired or wireless.


  4. #4
    DF MaSter daven's Avatar
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    Default Re: Unidentified network in Windows 7, can't connect to the internet

    Funny enough I have a similar problem that started on one PC on my home wireless network which seemed to have started just after an update earlier this week. Not had time to look into it but won't connect to homegroup or NAS. Disconnect and the re-connect to the Sky Hub doesn't seem to do anything but then it will start working ok for no apparent (at the moment) reason.

  5. #5
    DF Super Moderator
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    Default Re: Unidentified network in Windows 7, can't connect to the internet

    I had a suspicion that a software update was to blame when I saw it in quick succession, whether it be a windows update or another software update I am not sure though. A search of google shows a lot of new threads over the past month.

    I will be there tomorrow so will see what I can fathom.


  6. #6
    DF Super Moderator
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    Default Re: Unidentified network in Windows 7, can't connect to the internet

    Fixed it, was a simple
    Code:
    sfc /scannow
    Fortunately it was the first thing I tried today.

    Thanks to evilsatan

    neilcritc (4th March 2014) 


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