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cannot connect to wifi

Discussion in 'Networking' started by tuturugakacili, Dec 30, 2012.

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  1. tuturugakacili

    tuturugakacili Thread Starter

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    My laptop connected to internet with wifi, but it cannot use even my laptop detect connected, when i run trobleshooter it's show 'no valid IP address' even i already set up to automatically detect , restart my wifi router and unplug doesn't make any changes, how should i do for this problem ? Thank you for the answer.
     
  2. etaf

    etaf Moderator

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    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, Mcafee , AVG , Webroot etc

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

    This should also work for windows 8
    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.
    ------------------------------------------------------------------------
     
  3. tuturugakacili

    tuturugakacili Thread Starter

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    Hello Etaf, this is the result from my laptop,

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : VAIO
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Wireless LAN adapter Local Area Connection* 14:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #2
    Physical Address. . . . . . . . . : CA-F7-33-24-95-CA
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter Local Area Connection* 13:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Hosted Network Virtual Adapter
    Physical Address. . . . . . . . . : CA-F7-33-24-95-C9
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter Local Area Connection* 12:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
    Physical Address. . . . . . . . . : C8-F7-33-24-95-C9
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Bluetooth Network Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
    Physical Address. . . . . . . . . : C8-F7-33-24-95-CC
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Ethernet:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical Address. . . . . . . . . : 54-53-ED-1D-20-CD
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter Wi-Fi:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Intel(R) Centrino(R) Advanced-N 6235
    Physical Address. . . . . . . . . : C8-F7-33-24-95-C8
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::24bc:fca:e5eb:8339%12(Preferred)
    Autoconfiguration IPv4 Address. . : 169.254.131.57(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.0.0
    Default Gateway . . . . . . . . . :
    DHCPv6 IAID . . . . . . . . . . . : 264828723
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-3E-13-C9-C8-F7-33-24-95-C8
    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
    fec0:0:0:ffff::2%1
    fec0:0:0:ffff::3%1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter isatap.{A4E76FAB-CCE9-4790-A585-A4539AF53265}:

    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 Teredo Tunneling Pseudo-Interface:

    Media State . . . . . . . . . . . : Media disconnected
    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

    I used AVG anti virus & Smadav in my laptop

    Thank you so much Etaf for the answer.
     
  4. etaf

    etaf Moderator

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    you dont want two antivirus - so i would take them both off and see if that resolves the issue - you can always put one back on later

    AVG Removal Tools
    http://www.avg.com/gb-en/utilities
    http://www.avg.com/ww-en/utilities

    > removal tool, that can be used with AVG 2013 http://www.avg.com/tools#tba2 - > on Installation Tab > use the AvgRemover
    > removal tool, that can be used with AVG 2012 http://www.avg.com/tools2012.tpl-mcr1#tba2 -> on Installation Tab > use the AvgRemover
    > removal tool, that can be used with AVG 2011 http://www.avg.com/tools2011.tpl-mcr1#tba2 -> on Installation Tab > use the AvgRemover
    > removal tool, that can be used with AVG 9.0 http://www.avg.com/tools9.tpl-mcr1#tba2 -> on Installation Tab > use the AvgRemover
    > removal tool, that can be used with AVG 8.5 http://www.avg.com/tools8.tpl-mcr1#tba2 -> on Installation Tab > use the AvgRemover

    ALSO
    can you connect by cable to the router and does it work that way at all
     
  5. tuturugakacili

    tuturugakacili Thread Starter

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    But in my PC, with 2 anti virus it's no problem, I can connect with wifi, also if i connect directly to my laptop with cable it works, and i try connect with handphone by wifi it works too, i confused because it's connected but there is "limited" word, so i can access the internet but it's connected, how can i fix it ?

    Thanks.
     
  6. etaf

    etaf Moderator

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    theres no connection shown in the ipconfig /all you posted
    confused now

    If you PC is connected and working - then what are we fixing - can you give detail
     
  7. tuturugakacili

    tuturugakacili Thread Starter

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    Sorry Etaf, ;) i mean, i use 2 computer, my PC & laptop, so i connect it with wifi router, what detail from my laptop that i can explain to fix this ?
     
  8. etaf

    etaf Moderator

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    and which one does not work ?
     
  9. tuturugakacili

    tuturugakacili Thread Starter

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    my laptop cannot connect, and that ipconfig result is from my laptop
     
  10. etaf

    etaf Moderator

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    ok , so can it connect by cable at all

    can you remove AVG and Smadav
     
  11. tuturugakacili

    tuturugakacili Thread Starter

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    yes by cable it can connect, okay i will remove AVG and Smadav, then i will try to connect it.
    Thank you Etaf, tomorrow we discuss more, now i'm so sleepy :) Thanks..
     
  12. etaf

    etaf Moderator

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    lets see a xirrus screen shot - is the wireless actually switched on , often a physical switch or a combination of FN and one of the F keys

    ------------------------------------------------------------------------
    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.
    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.
    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/

    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
    ------------------------------------------------------------------------
     
  13. tuturugakacili

    tuturugakacili Thread Starter

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    Okay Etaf, tomorrow i will try this, Thank you so much.
     
  14. tuturugakacili

    tuturugakacili Thread Starter

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    Hello Etaf, i already uninstall AVG and Smadav anti virus, still cannot connect to wifi, here i attach Xirrus screen shoot and my laptop specifications, thank you
     

    Attached Files:

  15. tuturugakacili

    tuturugakacili Thread Starter

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    just for information, sometimes my PC cannot connect to wifi after i unplug the LAN cable, but it can fix only buy disable then enable again, why in my laptop it cannot fix even i already do same thing, i run windows network diagnostics and problems found is "WIFI doesn't have a valid IP configuration"
     
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