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can't connect to wireless networks anymore

Discussion in 'Networking' started by davejwalk, Sep 7, 2012.

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  1. davejwalk

    davejwalk Thread Starter

    Joined:
    Sep 7, 2012
    Messages:
    3
    2 days ago I lost the ability to connect to my wireless home network on my laptop. I can still see my wireless network but am unable to connect to it. I am able to connect to my network on all my other devices. I am currently using an ethernet cable to connect my laptop. This problem seems to have started when when my daughter was setting up her new ipod touch, but that's just a guess.

    Tech Support Guy System Info Utility version 1.0.0.2
    OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
    Processor: Genuine Intel(R) CPU U4100 @ 1.30GHz, Intel64 Family 6 Model 23 Stepping 10
    Processor Count: 2
    RAM: 2936 Mb
    Graphics Card: Mobile Intel(R) 4 Series Express Chipset Family, 7 Mb
    Hard Drives: C: Total - 290142 MB, Free - 153182 MB;
    Motherboard: Dell Inc., 03T80F
    Antivirus: AVG Anti-Virus Free Edition 2012, Updated and Enabled
     
  2. etaf

    etaf Moderator

    Joined:
    Oct 2, 2003
    Messages:
    64,856
    First Name:
    Wayne
    can we see an ipconfig /all and an xirrus screen shot - see below

    have you tried logging into the router and removing any wireless security and then see if the laptop will connect to the wireless network with no security - if it does , try going back to the router and resetting the wireless password again

    ------------------------------------------------------------------------
    ipconfig /all
    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.

    We would like to see the results from an ipconfig /all - post back the results in a reply here.

    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 command:

    Note that there is a space before the /ALL, but there is NOT a space after the / in the following command.

    ipconfig /all > network.txt & network.txt

    It will export the results into notepad and then automatically open the notepad and display on your screen.

    Now all you need to do is copy and paste those results into a reply here
    to do that:
    From the notepad menu - choose Edit - Select all
    all the text will now be highlighted
    Next
    From the notepad menu - choose Edit - Copy

    Now go back to the forum - goto the reply and then right click in the reply box and paste the results.
    The results from the notepad should now appear in the forum reply.
    ------------------------------------------------------------------------
    ------------------------------------------------------------------------
    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 have NET 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. davejwalk

    davejwalk Thread Starter

    Joined:
    Sep 7, 2012
    Messages:
    3
    Windows IP Configuration

    Host Name . . . . . . . . . . . . : TaraWalker-PC
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : Belkin

    Wireless LAN adapter Wireless Network Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . : Belkin
    Description . . . . . . . . . . . : Intel(R) WiFi Link 5100 AGN
    Physical Address. . . . . . . . . : 00-24-D6-90-DB-46
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . : Belkin
    Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical Address. . . . . . . . . : F0-4D-A2-53-64-3E
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IPv6 Address. . . . . . . . . . . : 2002:c0a8:5:1234:6407:7396:a59e:7ede(Preferred)
    Temporary IPv6 Address. . . . . . : 2002:c0a8:5:1234:d37:c2e2:6aa4:78df(Preferred)
    Link-local IPv6 Address . . . . . : fe80::6407:7396:a59e:7ede%10(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.2.2(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : Saturday, September 08, 2012 4:02:20 PM
    Lease Expires . . . . . . . . . . : Monday, September 06, 2021 6:37:44 PM
    Default Gateway . . . . . . . . . : fe80::222:75ff:fe61:7614%10
    192.168.2.1
    DHCP Server . . . . . . . . . . . : 192.168.2.1
    DHCPv6 IAID . . . . . . . . . . . : 250629538
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-4E-79-8F-F0-4D-A2-53-64-3E
    DNS Servers . . . . . . . . . . . : 192.168.2.1
    192.168.2.1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter isatap.Belkin:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Local Area Connection* 12:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft 6to4 Adapter
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:182a:cc1:b45c:fef3(Preferred)
    Link-local IPv6 Address . . . . . : fe80::182a:cc1:b45c:fef3%13(Preferred)
    Default Gateway . . . . . . . . . :
    NetBIOS over Tcpip. . . . . . . . : Disabled
     

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  4. TerryNet

    TerryNet Moderator

    Joined:
    Mar 23, 2005
    Messages:
    76,645
    First Name:
    Terry
    Wanna try that Xirrus screen shot again? I'm not seeing much there. But maybe enough given my growing suspicions about that adapter.

    Make sure you have the latest wireless driver from your laptop manufacturer's web site.

    Disable encryption on the router and try to connect. If successful re-enable encryption and see if you can reconnect. If that reconnect attempt is not successful then again disable encryption and connect. Now set WPA-PSK (not WPA2) encryption and try to reconnect. Please tell us exactly what worked and didn't work for these steps.
     
  5. davejwalk

    davejwalk Thread Starter

    Joined:
    Sep 7, 2012
    Messages:
    3
    I still have the same problem when I disable security. I can't connect to neighbors unsecured network either.
    It looks like there is an updated driver on the dell website but when I try to install it I get a setup error saying "the software package cannot be installed on your system"
     

    Attached Files:

  6. TerryNet

    TerryNet Moderator

    Joined:
    Mar 23, 2005
    Messages:
    76,645
    First Name:
    Terry
    Thanks for the new Xirrus screen shot. That Signal History chart shows a serious problem. A variance of two, even four or five, dBm is normal, but yours is showing from -50 to -65 dBm.

    That could be caused by a defective router, wrong or corrupted wireless driver, or defective wireless adapter. Adding in the other information you've given I think that the adapter has failed (or possibly the motherboard in the area where the adapter connects). Here are a few things I would do before giving up on the adapter ...

    See if etaf has additional ideas. (He may be "AWOL" for nearly a day from the time of this post.)

    In Device Manager right click on the wireless and select 'Uninstall.' Then try the install of the updated driver again (double check that you have downloaded the correct driver--Windows 7 64-bit).

    If the adapter is accessible through a cover on the bottom of the laptop remove and carefully and firmly reinstall the card several times. Make sure the antenna leads are secure.

    Boot to a Live CD of Puppy Linux. While I don't know for sure I expect that adapter should work fine with Puppy. (If you haven't dealt with Linux before this is probably more effort than it's worth.)
     
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