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Solved: Sudden loss of Wi-Fi connectivity

Discussion in 'Networking' started by Nemo2000, Feb 15, 2009.

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  1. Nemo2000

    Nemo2000 Thread Starter

    Joined:
    Jul 5, 2006
    Messages:
    225
    Help !!!

    Situation so far:-

    HP laptop with in-built WiFi adaptor running Vista SP1, connecting by wireless to D-Link router on home network. All working OK until today. Used laptop this morning OK, then shut down. When switched on this afternoon, no longer able to make wif-fi connection.

    Checked that all IP settings correct. WiFi software seems to see other networks in my areas - and even connected briefly to one! - so physical adaptor probably OK. Router reports no obvious problem and I can link to it OK with another old XP SP3 laptop, so probably a problem specific to the Vista machine. Windows reports 'timeout error' whenever I try to connect to my own network. I have deleted existing network entry, re-booted and re-submitted several times with no luck. It appears to be some problem about the security keys - see the event log extract at the end of this message.

    One possible clue......when I shut down the laptop this AM it ran some Windows updates. Might this have a connection ? (excuse the pun!) I tried to roll them back later on, but System restore failed :mad:

    ------------------------
    Event log text from diagnostic run:-

    Helper Class (L2Sec Helper Class) Event:

    For complete information about this session see the Wireless Diagnostic Informational Event.

    Helper Class: Layer2 Security
    Initialize Status: Success

    Result of diagnosis: Problem found

    Root cause:
    Windows cannot connect to "FIRS-NET"
    Wireless authentication failed because of a timeout.

    Detailed root cause:
    Layer 2 security key exchange did not generate multicast keys before timeout

    Repair option:
    View available wireless networks
    You can then try connecting to "FIRS-NET" again or try connecting to a different network.
    If you own or set up this network, reset your wireless router or access point and try connecting again.

    Information for connection being diagnosed
    Interface GUID: {9b68427b-6ab0-466a-be6c-928d9db541fc}
    Interface name: Atheros AR5007 802.11b/g WiFi Adapter
    Interface type: Native WiFi
    Profile: Discovery connection
    SSID: FIRS-NET
    SSID length: 8
    Connection mode: Infra
    Security enabled: Yes
    Connection ID: 1
    Security settings provided by hardware manufacturer (IHV): No
    Profile matches network requirements: Yes
    Pre-Association and association status: Success
    Security and Authentication:
    Configured security type: Wireless Protected Access with pre-shared keys (WPA-PSK)
    Configured Encryption type: TKIP
    Security connect status: Fail 0x00048005
    Number of security packets received: 4
    Number of security packets sent: 2
    802.1X protocol: No
    Key exchange initiated: Yes
    Unicast keys received: Yes
    Multicast keys received: No
     
  2. Nemo2000

    Nemo2000 Thread Starter

    Joined:
    Jul 5, 2006
    Messages:
    225
    PS.......

    Following advice read form another thread I've tried to reset the IP stack as follows:-

    Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

    Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

    Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

    but each time that I try any of those command I get the message "This command requires elevation" ????? I am using a user account that has admin privileges.
     
  3. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Follow the instructions here EXACTLY and it'll work.


    TCP/IP stack repair options for use with Windows Vista.

    Start, All Programs\Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt.

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

    Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

    Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

    Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

    Reboot the machine.
     
  4. Nemo2000

    Nemo2000 Thread Starter

    Joined:
    Jul 5, 2006
    Messages:
    225
    JohnWill - I realise now that what I did not do was to RIGHT click on 'Command Prompt' :( When I tried to reset yesterday I did a Left click and assumed that the lack of the 'Run as Adminstrator' prompt was because I was a user with admin rights.

    By the time that I read your reply today, the problem seems to have solved itself! After several hours of frustrated repeated attempts yesterday it all suddenly came back :mad: Incidentally, in the course of trying to diagnose the problem I found also that it worked OK with WPA turned off, but failed again when it was turned back on :confused:

    I'll mark the issue as solved thanks and keep the info for reference in case I need it again (y)
     
  5. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Thanks for the feedback. :)
     
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