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Solved: Local Area Connection doesn't have a valid IP configuration - Windows 7

Discussion in 'Networking' started by Twombly, Aug 1, 2012.

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  1. Twombly

    Twombly Thread Starter

    Joined:
    Aug 1, 2012
    Messages:
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    So I built a PC recently, using Powerline for Internet access. At first the PC wouldn't connect to the Internet so I moved the wireless router and the Powerline plug into another room and plugged them directly into the wall socket (previously they were plugged into an extension lead). I got Internet access on my PC, but 2 laptops and another PC were having trouble connecting to the Internet using Wi-Fi. When I moved the router and Powerline plug back to their original place, my PC wouldn't connect again (all other computers could) and I got the "Local Area Connection doesn't have a valid IP configuration" error from the network troubleshooting tool.

    So it's either I'm the only one that does get Internet when I move the router, or I'm the only one that doesn't get Internet when the router's in its normal place.

    Here's my ipconfig /all results from my PC that won't connect:

     
  2. etaf

    etaf Moderator

    Joined:
    Oct 2, 2003
    Messages:
    65,203
    First Name:
    Wayne
    you are doing actually doing two different things as far as i can make - is this correct

    Move Powerline from an extension lead and it works - This is because some powerline adapters will not work on an extension lead - so thats (1) and

    (2) moving the router is reducing the wireless signal

    so you need to find a way to keep the router where it is and not use an extension lead- maybe a longer ethernet cable

    from the wireless pcs can we see an xirrus screen shot - when its working OK and again when it is not - just in case its interference

    ------------------------------------------------------------------------
    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.

    http://www.xirrus.com/Products/Wi-Fi-Inspector.aspx
    Direct link to the program is here http://info.xirrus.com/Wi-FiInspectorConfirmation.html

    {If the above link does not work heres another link http://www.pcworld.com/downloads/file_download/fid,77196-order,4/download.html}

    Then run and install the program - on a wireless enabled PC/Laptop
    if you get an error - You need will need to haveNET Framework installed for the WiFi Inspector to function.

    Run the program

    A user guide is available here http://www.xirrus.com/cdn/pdf/Xirrus-Wi-Fi-inspectorguide-1-2-1-RevB-6.aspx

    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)

    To post a screen shot of the active window.
    1) 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.
    OR
    2) if you are using Vista/Windows 7 you can use the "snipping tool" which is found in Start> All programs> Accessories> Snipping Tool

    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

    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

    If you are using the Mac OS then use http://www.istumbler.net/ or
    if you want to optimise base station position and signal strength / dead spots use
    http://www.chimoosoft.com/products/apgrapher/ which has a graph function to monitor signal
    ------------------------------------------------------------------------
     
  3. Twombly

    Twombly Thread Starter

    Joined:
    Aug 1, 2012
    Messages:
    2
    Thanks for the reply. It seems that it was a case of moving the router for optimal wireless signal and plugging the Powerline directly to the mains as you said. All appears to be working well at the moment.
     
  4. etaf

    etaf Moderator

    Joined:
    Oct 2, 2003
    Messages:
    65,203
    First Name:
    Wayne
    (y) thanks for taking the time to let us know
     
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