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Win 7, can't communicate with DNS server - patchy issue

Discussion in 'Networking' started by afaik, Jul 11, 2014.

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  1. afaik

    afaik Thread Starter

    Joined:
    Jul 11, 2014
    Messages:
    1
    Hi, I've got an issue with connecting this PC via my wireless router to the internet. It is a patchy issue that works at times and at others, gives the messages:
    "Windows can't communicate with the device or resource (Primary DNS Server)."
    and
    "DNS server not responding"

    I've followed the three steps recommended here.

    Method 1 does after some time seem to enable the internet to connect, but it seems to last a short while then revert to the error messages posted above. This DNS error also happens on every startup and regularly thereafter.

    I've tried disabling firewalls, antivirus etc. and running malwarebytes, spotbot, ccleaner, avast and adaware scans, to no avail.

    On occasion when using the windows 'troubleshoot problems' on the network toolbar, it resets my network adapter and tells me the problem is solved. Alternate times I do this it just provides the DNS server error above.

    Due to the tempramental nature of this I've been unable to resolve it completely, but all other devices have no issues with connecting via the router, so it's definitely a problem with this machine.

    I have attached my 'ipconfig/all' file.

    My system info is:
    Tech Support Guy System Info Utility version 1.0.0.2
    OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
    Processor: Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz, Intel64 Family 6 Model 58 Stepping 9
    Processor Count: 8
    RAM: 16333 Mb
    Graphics Card: NVIDIA GeForce GTX 670, -2048 Mb
    Hard Drives: C: Total - 244095 MB, Free - 112266 MB; D: Total - 953866 MB, Free - 376954 MB;
    Motherboard: ASUSTeK COMPUTER INC., P8Z77-V PRO
    Antivirus: ZoneAlarm Antivirus, Disabled

    All help gratefully appreciated. Apologies if I've missed anything important.

    Edit: I've tried powering down the router, modem and PC for a while then restarting it all, but it didn't help. I am also unable to start my PC in safe mode, as the video driver doesn't run so the monitor goes black - this may be a limiting factor in my investigation :/
     

    Attached Files:

  2. etaf

    etaf Moderator

    Joined:
    Oct 2, 2003
    Messages:
    64,910
    First Name:
    Wayne
    we will go over old ground i'm afraid here

    1) you have zonealarm, as a virus product do you also have the firewall - make sure you remove all firewalls an use the removal tools - give us a list of what has ever been on the pc and we can give the tools address

    2) have you gone to the manufactures website and updated the driver or actually re-installed the driver

    3) quite a few things to try below
    a) tcp/ip reset
    b) ping tests - please do all three - would you post the following tests when the internet is working OK, and then repeat ALL the tests when the internet disconnects.
    Make sure you also indicate on the reply which tests are for what condition.
    c) Change DNS servers and see if that resolves the issue
    d) Uninstall the driver and re-install
    e) Post an xirrus screen shot
    f) Have you looked into channel interference - the xirrus screen shot will help with that
    ------------------------------------------------------------------------

    TCP/IP stack repair options for use with Vista/Windows 7/Windows 8

    For Windows Vista/Windows 7/8
    Start> Programs> Accessories> and right click on Command Prompt, select "Run as Administrator" to open a command prompt box (A new dialogue box - black with white font, will appear on the screen ):​

    For Windows 8
    To open a Cmd Prompt or an Administrator Cmd prompt from the Desktop. Use Win + X and choose Command Prompt or Command Prompt (Admin) from the list.​

    In the command prompt window that opens, type the following commands:

    Note: Type only the text in bold and red for the following commands.

    • Reset WINSOCK entries to installation defaults: netsh winsock reset catalog and press enter
    • Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log and press enter
    • Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log and press enter
    ReStart (reboot) the machine.

    If you receive the message
    The requested operation requires elevation.
    Then please open the command prompt as administrator - as requested above
    Start> Programs> Accessories> and right click on Command Prompt, select "Run as Administrator" to open a command prompt box (A new dialogue box - black with white font, will appear on screen ):
    Please note and post back - if you receive the following message :-
    Access is Denied
    This often occurs with windows 8

    please post back the results in a reply here - its important we know that these commands have worked correctly and not produced any errors
    right click in the command prompt box
    select all
    enter
    control key + C key - to copy
    then reply here and
    control key + V to paste

    Details also here
    http://support.microsoft.com/kb/299357
    also the link has a Microsoft Fix it , which will do the above for you

    ------------------------------------------------------------------------

    ------------------------------------------------------------------------
    Ping Tests
    If you cannot access the internet with this PC, then you will need to paste the results into something like notepad and then copy onto a machine that can access the internet and post the results in a reply here.
    Save the file to a USB flash drive or other removable media. Plug it into the working computer with internet access and copy the file and paste here.

    If you do not have another PC - do you have a phone connected to the internet - can you photograph the result and post the image in a reply

    For Windows 8
    To open a Cmd Prompt or an Administrator Cmd prompt from the Desktop. Use Win + X and choose Command Prompt or Command Prompt (Admin) from the list.​

    For windows version, XP, Vista, W7
    Hold the Windows key and press R

    Now type CMD

    then press Enter to open a command prompt box (A new dialogue box - black with white font, will appear on screen ): ​

    In the command prompt window that opens

    Type the following command
    Ping 192.168.1.1
    Post back the results in a reply here
    right click in the command prompt box
    select all
    enter
    control key + C key - to copy
    then reply here and
    control key + V to paste

    Type the following command
    Ping google.com
    Post back the results in a reply here
    right click in the command prompt box
    select all
    enter
    control key + C key - to copy
    then reply here and
    control key + V to paste

    Type the following command
    Ping 72.52.204.213
    Post back the results in a reply here
    right click in the command prompt box
    select all
    enter
    control key + C key - to copy
    then reply here and
    control key + V to paste



    if you see on the results a
    "general Failure"
    This sometimes means a firewall issue
    What firewall / security suite or anti-virus do you currently have on the PC - or you have ever had on the PC in the past - any trial ware - like Norton, kaspersky or Mcafee or any free security suites like zonealarm, AVG , Webroot etc

    ------------------------------------------------------------------------
    ------------------------------------------------------------------------

    Google public DNS
    Note using google public DNS servers from outside the US may actually slow performace - so use the following as a test to identify DNS issues - if these resolve the issues , then we need to investigate further to optimise the use of DNS


    Google public DNS
    https://developers.google.com/speed/public-dns/

    Theres also a link on how to setup those DNS IP address up on a PC
    http://code.google.com/speed/public-dns/docs/using.html

    Then once you have set up those DNS entries

    Flush & register DNS

    Hold the Windows key and press R, then type CMD then press Enter to open a command prompt box (A new dialogue box - black with white font, will appear on screen ):
    In the command prompt window that opens, type the following commands:

    Ipconfig/flushdns
    ipconfig/registerdns


    If you receive the message
    The requested operation requires elevation.
    Then please open the command prompt as administrator
    Start> All Programs> Accessories and then right click on Command Prompt, select "Run as Administrator" to open a command prompt.

    now type the command again

    I have found these to be a useful tools to use for DNS testing
    https://www.grc.com/dns/benchmark.htm
    https://code.google.com/p/namebench/

    ------------------------------------------------------------------------
    ------------------------------------------------------------------------

    Uninstall and allow windows to re-install the adapter and Driver
    goto the device manager > Network Adapters > click on the [+] to show all the adapters

    right click on the adapter and from the menu

    remove/uninstall the adapter

    Now restart the pc and allow windows to detect new hardware and re install the adapter and the driver
    ------------------------------------------------------------------------
    ------------------------------------------------------------------------
    Run Xirrus Wi-Fi Inspector
    Download and install

    If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
    Save the file to a USB flash drive or other removable media. Plug it into the working computer with internet access and copy the file and install the program.
    You will now need to take a screen shot and copy that back to the working PC and attach the screen shot in a reply on the forum here.

    If you do not have another PC - do you have a phone connected to the internet - can you photograph the result and post the image in a reply

    http://www.xirrus.com/Products/Wi-Fi-Inspector.aspx
    Download this file "DOWNLOAD WI-FI INSPECTOR Vx.xx "
    ( the site now appears to require a business email, and does not allow webbased emails like gmail,hotmail or yahoo etc )
    There is also a xirrus gadget, But that does not have all the fuctionality "DOWNLOAD GADGET Vx.xx

    Use the links below

    http://www.pcworld.com/downloads/file_download/fid,77196-order,4/download.html
    http://www.softpedia.com/progDownload/Xirrus-Wi-Fi-Monitor-Download-99109.html

    Then run and install the program - on a wireless enabled PC/Laptop
    if you get an error - You will need to have NET Framework installed for the WiFi Inspector to function.
    On windows 8 - (i do not have windows 8) but, it would appear that, When you first try to run, you may get a message that .net framework is needed, and included in that message is a link to download/install.

    Run the program

    A user guide is available here
    http://www.xirrus.com/cdn/pdf/xirruswifiinspectorguide1-2-0

    post a screen shot of the program running.
    if there are a lot of networks showing can you click on "networks" top lefthand area - so we can see all the network information.

    post which SSID name is yours, its located in the list, under network "Adapter Name" (1st column)


    Note:
    For a reliable (or robust as the Xirrus user guide says) wireless connection you need a signal of about -70 dBm or better. "A desirable signal level for a robust Wi-Fi connection will be green".
    note: the signal level is a negative number, so for example -88 is worst and -40 is better

    To post a screen shot of the active window.

    Windows XP
    Hold the Alt key and press the PrtScn key. Open the Windows PAINT application (Start> All Programs> Accessories> Paint) and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.

    Vista or Windows 7
    you can use the "snipping tool" which is found in Start> All programs> Accessories> Snipping Tool
    http://www.bleepingcomputer.com/tutorials/how-to-use-the-windows-snipping-tool/

    Windows 8
    you can use the snipping tool > Open Snipping Tool (From the Windows 8 Start Screen, type "snip" and press enter.
    >Press the Esc. key.
    >go back to your Windows 8 start screen - Swipe from left or press Window Button
    >Press Ctrl+PrntScr button to use Snipping Tool
    see here
    http://www.pcadvisor.co.uk/opinion/windows/3415854/how-take-screenshot-in-windows-8/
    http://www.pcadvisor.co.uk/how-to/windows/3405830/how-take-screenshot-in-windows-8/


    To upload the screen shot to the forum, open the full reply window ("Go Advanced" button) and use the Manage Attachments button to upload it here.
    Full details are available here http://library.techguy.org/wiki/TSG_Posting_a_Screenshot
     
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