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Usb dongle picks up neighbour's wireless signals but not mine..?

Discussion in 'Networking' started by marmaris, Dec 24, 2012.

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  1. marmaris

    marmaris Thread Starter

    Sep 25, 2009

    i have acer laptop with built in wireless etc
    i have also an old HP desktop computer and i have been using USB dongle to access to internet

    Currently my HP desktop computer's USB dongle doesn't pick up my wireless signal but it does pic up all my neighbours networks as i can see the list of more than 10 available wireless connections there but not my own one !

    I am sitting here and my laptop pick up my wireless signal with no problem but the other computer's USB dongle doesn't pick it up !

    someone told me that this is all to do with my security software which is norton 2012

    but i have been connecting to internet with this usb dongle before but suddenly it all stopped

    can someone please help me

    regards and thanks
  2. etaf

    etaf Moderator

    Oct 2, 2003
    First Name:
    norton, can give connection problems - not seen it stop seeing the networks

    from the working laptop as near to the desktop as possible - post and xirrus (see below) and make sure we know which is your network
    and also post an xirrus from the desktop - make sure we know which xirrus is which

    are you paying a subscription to norton, if not then remove it with the removal tool - (see below)

    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.

    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 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/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.
    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

    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/

    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


    Norton Removal Tool
    I would recommend that you restart the PC and run the removal tool for a second time - I have found instances where the removal tool needs to be run twice to fully remove all traces of norton and symantec from the PC
    https://www-secure.symantec.com/nor...t=Norton Core&pvid=f-core-cur&version=current

    All Versions - The Norton Removal Tool uninstalls all Norton 2010/2009/2008/2007/2006/2005/2004/2003 products, Norton 360 and Norton SystemWorks 12.0 from your computer.

  3. marmaris

    marmaris Thread Starter

    Sep 25, 2009
    i don't think there is anything wrong with my router (using talktalk router here in UK) because my laptop does pick up the signal with no problem

    but for some reason my desktop computer's usb dongle can not see my talktalk signal but can pick up all other signals around my house
  4. etaf

    etaf Moderator

    Oct 2, 2003
    First Name:
    i'm in UK on talktalk too

    can you post the tests - just wanted to see the difference between laptop and desktop with xirrus - quite a good diagnostic
  5. MorbidSteve


    Feb 3, 2008
    I would suggest doing as etaf asked, as you came to this forum for help and he is offering...
  6. TerryNet

    TerryNet Moderator

    Mar 23, 2005
    First Name:
    What channel are you using? What channels does the USB wireless adapter/driver support?
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