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Spotty connection, slow speed

Discussion in 'Networking' started by FDT, Mar 11, 2012.

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  1. FDT

    FDT Thread Starter

    Joined:
    Mar 11, 2012
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    Hi,

    Up until two days ago, my laptop was working fine. It is a Lenovo Y530 running Windows 7.

    I stayed at a hotel over the weekend. They had open wireless that then required I enter the hotel's weekly username and password. It worked fine the first night.

    The second night it stopped working. I was unable to connect successfully; I would connect, and then I would receive the "Unidentified Network" with a yellow hazard triangle in the wireless menu.

    I assumed it had something to do with the hotel. But when I returned home, I could not connect to either of my home networks, or a neighbor's connection.

    This morning I connected via ethernet, and looked for solutions. The only change I made was to flush DNS. When I removed the ethernet connection, I was able to connect via Wifi.

    That only lasted a couple minutes before my connection dropped. Now it disconnects and reconnects every couple of minutes.

    I opened my laptop up to see if there were any loose wires connecting to the wireless adapter - I had been running around with my laptop in a backpack the day before - but there weren't any issues.

    Some other symptoms are that I can sometimes only see a fraction of the available networks at once; I know there are many wireless networks around my house (~12), but sometimes I can only see three or five. Also, a speedtest used to give ~20/5 download/upload, but I now am receiving .23/.14. Most alarming is that I can sometimes only see one of my own home networks at a time, both of which I receive five bars for.

    Are there any reasons this should be happening? Any fixes I can try?

    Thanks,
    David
     
  2. TerryNet

    TerryNet Moderator

    Joined:
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    First Name:
    Terry
    What firewall or security suite?

    Make sure you have the latest wireless driver--from Lenova's web site if an integrated adapter. If you already have the latest driver use Device Manager to uninstall it; reboot and let Windows discover the adapter and reinstall the driver.

    TCP/IP stack repair options for use with Vista or 7.

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

    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.
     
  3. FDT

    FDT Thread Starter

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    Mar 11, 2012
    Messages:
    3
    Thanks for the reply,

    I am runnning Avast Antivirus with Comodo Firewall. Both are the free versions.

    I have the latest driver, and so uninstalled and rebooted. Windows reinstalled the driver, and the problem remained.

    I then followed the TCP/IP stack repair options, and am still having the problem.

    I've also since noticed that though I can get spotty connection with my 2.4 ghz channel, I cannot connect whatsoever to my 5 ghz channel.
     
  4. TerryNet

    TerryNet Moderator

    Joined:
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    First Name:
    Terry
    I'm suspecting a dying wireless adapter. I believe you've already checked for loose antenna connections. In case the adapter's contacts are corroded remove and reinsert it several times.
     
  5. FDT

    FDT Thread Starter

    Joined:
    Mar 11, 2012
    Messages:
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    Gave it a shot, no change.

    I was hoping it wasn't hardware related, but it looks like I've got to face that.

    Thanks for the help.
     
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