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    Wifi network adapter randomly gets limited connectivity and freezes


    I'm having a really annoying problem which is making my laptop almost unusable and a hassle to use. After a while of my laptop being on, my wireless network adapter will suddenly get "limited connectivity", and won't connect to the internet.

    Disabling and enabling the adapter will cause my computer to freeze, requiring a restart. The same with troubleshooting. The only thing which fixes this is a fresh reboot, however it always occurs again within the hour.

    Sometimes the entire adapter will randomly just disable itself, and the computer will completely freeze, meaning I have to press the power on/off. Sometimes the adapter will just disappear from Device Manager. Searching for "plug and play" devices will cause it to freeze.

    Apart from having to reboot, what also seems to work is disabling the wifi from PC Settings, putting the computer to sleep, then awaking it and turning wifi back on. I've had to do that 6 times whilst typing this post.

    I've tried flushing my dns, registering it, renewing and releasing. Assigning a static DNS address. All those things. Though I may have done them wrong.

    Specs:

    Laptop model: Samsung RV511 (i5) notebook from around 2010
    4GB RAM, Intel(R)Core(TM) i5 CPU M 480@ 2.67GHz

    Operating system: Originally came with Windows 7 64bit installed, issue began on this.
    I installed Windows 8 64bit Pro a month ago, did not reset settings. Problem persists

    Broadcom 802.11n wireless network adapter
    Device ID 4727
    Driver date: 13/03/2012
    Driver: 5.100.245.20

    It's the latest driver according to Windows. I keep uninstalling the driver and installing random ones from 2006, 2011 etc however the same problem persists.

    I've tried uninstalling the driver and just rebooting, but problem still comes back after a while.

    When it works:

    Microsoft Windows [Version 6.2.9200]
    (c) 2012 Microsoft Corporation. All rights reserved.

    C:\Users\Stefan>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : Zangara-RV511
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : Home

    Wireless LAN adapter Local Area Connection* 14:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
    Physical Address. . . . . . . . . : 02-1B-B1-A8-0E-96
    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. . . . . . . . . : 00-1B-B1-A8-0E-96
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter WiFi:

    Connection-specific DNS Suffix . : Home
    Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
    Physical Address. . . . . . . . . : 00-1B-B1-A8-0E-96
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::707a:5b5:776:2968%21(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.0.9(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : 25 April 2013 10:33:55
    Lease Expires . . . . . . . . . . : 26 April 2013 10:34:03
    Default Gateway . . . . . . . . . : 192.168.0.1
    DHCP Server . . . . . . . . . . . : 192.168.0.1
    DHCPv6 IAID . . . . . . . . . . . : 452991921
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-38-BD-35-E8-11-32-1D-21-66

    DNS Servers . . . . . . . . . . . : 192.168.0.1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Bluetooth Network Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
    Physical Address. . . . . . . . . : 00-1B-B1-F8-DC-FC
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Local Area Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical Address. . . . . . . . . : E8-11-32-1D-21-66
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes


    C:\Users\Stefan>Ping 192.168.0.1

    Pinging 192.168.0.1 with 32 bytes of data:
    Reply from 192.168.0.1: bytes=32 time=2ms TTL=64
    Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.0.1: bytes=32 time=3ms TTL=64
    Reply from 192.168.0.1: bytes=32 time=2ms TTL=64

    Ping statistics for 192.168.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
    Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 3ms, Average = 2ms

    C:\Users\Stefan>Ping google.com

    Pinging google.com [173.194.34.99] with 32 bytes of data:
    Reply from 173.194.34.99: bytes=32 time=48ms TTL=57
    Reply from 173.194.34.99: bytes=32 time=48ms TTL=57
    Reply from 173.194.34.99: bytes=32 time=49ms TTL=57
    Reply from 173.194.34.99: bytes=32 time=48ms TTL=57

    Ping statistics for 173.194.34.99:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
    Approximate round trip times in milli-seconds:
    Minimum = 48ms, Maximum = 49ms, Average = 48ms

    C:\Users\Stefan>Ping 209.183.226.152

    Pinging 209.183.226.152 with 32 bytes of data:
    Reply from 209.183.226.152: bytes=32 time=128ms TTL=51
    Reply from 209.183.226.152: bytes=32 time=143ms TTL=51
    Reply from 209.183.226.152: bytes=32 time=129ms TTL=51
    Reply from 209.183.226.152: bytes=32 time=128ms TTL=51

    Ping statistics for 209.183.226.152:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
    Approximate round trip times in milli-seconds:
    Minimum = 128ms, Maximum = 143ms, Average = 132ms

    SSID: SKY459DD
    Xirrus screenshots blocked by forum


    When it doesn't work:

    Microsoft Windows [Version 6.2.9200]
    (c) 2012 Microsoft Corporation. All rights reserved.

    C:\Users\Stefan>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : Zangara-RV511
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : Home

    Wireless LAN adapter Local Area Connection* 14:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
    Physical Address. . . . . . . . . : 02-1B-B1-A8-0E-96
    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. . . . . . . . . : 00-1B-B1-A8-0E-96
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter WiFi:

    Connection-specific DNS Suffix . : Home
    Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
    Physical Address. . . . . . . . . : 00-1B-B1-A8-0E-96
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::707a:5b5:776:2968%21(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.0.9(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : 25 April 2013 10:33:55
    Lease Expires . . . . . . . . . . : 26 April 2013 10:34:03
    Default Gateway . . . . . . . . . : 192.168.0.1
    DHCP Server . . . . . . . . . . . : 192.168.0.1
    DHCPv6 IAID . . . . . . . . . . . : 452991921
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-38-BD-35-E8-11-32-1D-21-66

    DNS Servers . . . . . . . . . . . : 192.168.0.1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Bluetooth Network Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
    Physical Address. . . . . . . . . : 00-1B-B1-F8-DC-FC
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter Local Area Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical Address. . . . . . . . . : E8-11-32-1D-21-66
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    C:\Users\Stefan>ping 192.168.0.1

    Pinging 192.168.0.1 with 32 bytes of data:
    Request timed out.
    Reply from 192.168.0.9: Destination host unreachable.
    Request timed out.
    Request timed out.

    Ping statistics for 192.168.0.1:
    Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),

    C:\Users\Stefan>ping google.com
    Ping request could not find host google.com. Please check the name and try again
    .

    C:\Users\Stefan>ping 209.183.226.152

    Pinging 209.183.226.152 with 32 bytes of data:
    Reply from 192.168.0.9: Destination host unreachable.
    Request timed out.
    Reply from 192.168.0.9: Destination host unreachable.
    Request timed out.

    Ping statistics for 209.183.226.152:
    Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),

    C:\Users\Stefan>Ping 192.168.0.1

    Pinging 192.168.0.1 with 32 bytes of data:
    Request timed out.
    Request timed out.

    Ping statistics for 192.168.0.1:
    Packets: Sent = 2, Received = 0, Lost = 2 (100% loss),
    C:\Users\Stefan>

    SSID: SKY459DD
    Xirrus screenshots blocked by forum

    Info:
    I use Microsoft Security Essentials. I think I may have had a trial version of McCafee a long while back, which has now been uninstalled.

    Router: It's a Sky Broadband Sagecom router, however I am the only one to experience this problem and also I experience the same issue at work with a different router.

    Please can anyone help?
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    First delete any of those unneeded network connections by going to network and sharing center>change adapter settings.

    For your adapted called Wireless Lan Adapter Wifi try re-installing TCP/IP by right clicking that adapter and selecting properties (in network and sharing center>change adapter settings). Select Install>Protocol>Have Disk>C:\windows\inf>select TCP/IPv4 and hit ok. Reboot the PC and see if that fixes it.

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