Windows 8 and 8.1 Forums


Computer disappears from local network after a few hours

  1. #1


    Norway
    Posts : 6
    Windows 8.1

    Computer disappears from local network after a few hours


    I have a local network at home with 1 router, 5-6 computers and a few gadgets connected through WiFi.

    I have a problem with one of the computers with Windows 8.1, let's call it Computer A. When I boot it, it is connectable from the other computers using its local IP address. But after a few hours it usually disappears from the network, and I'm only able to connect to it using the router's external IP and port forwarding.

    By "disappears from the network", I mean that it's still connected to the router and to the internet, but none of the other units on the network is able to connect to it in any way.

    Computer A can always connect to the the other computers on the network and to the internet.

    The problem is solved if I reboot Computer A, so at the moment I have a scheduled task to reboot it every night. Unfortunately, sometimes it disappears from the local network after only a few hours after boot.

    I have not been able to find any other solution except reboot, and I have no idea where to start debugging this issue.

    Turning the firewall off on Computer A doesn't help.

    I would be thrilled if anyone has any suggestions to what may cause this problem.


    Below is the result of ipconfig /all on Computer A:

    Code:
    C:\WINDOWS\system32>ipconfig /all
    
    Windows IP Configuration
    
    
       Host Name . . . . . . . . . . . . : bjarte-media2
       Primary Dns Suffix  . . . . . . . :
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : getinternet.no
    
    
    Wireless LAN adapter Local Area Connection* 2:
    
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
       Physical Address. . . . . . . . . : 3C-A9-F4-33-20-C9
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    
    Wireless LAN adapter Wi-Fi:
    
    
       Connection-specific DNS Suffix  . : getinternet.no
       Description . . . . . . . . . . . : Intel(R) Centrino(R) Ultimate-N 6300 AGN
       Physical Address. . . . . . . . . : 3C-A9-F4-33-20-C8
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
       Link-local IPv6 Address . . . . . : fe80::65dd:af0c:96c5:6393%4(Preferred)
       IPv4 Address. . . . . . . . . . . : 192.168.66.187(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Lease Obtained. . . . . . . . . . : 9. desember 2013 12:38:11
       Lease Expires . . . . . . . . . . : 10. desember 2013 12:38:10
       Default Gateway . . . . . . . . . : 192.168.66.66
       DHCP Server . . . . . . . . . . . : 192.168.66.66
       DHCPv6 IAID . . . . . . . . . . . : 473737716
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-19-41-A4-95-EC-A8-6B-F4-E5-FA
    
    
       DNS Servers . . . . . . . . . . . : 84.208.20.110
                                           84.208.20.111
       NetBIOS over Tcpip. . . . . . . . : Enabled
    
    
    Tunnel adapter Local Area Connection* 6:
    
    
       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. . . . . . . . . . . : 2001:0:5ef5:79fb:2c24:31fe:3f57:bd44(Pref
    erred)
       Link-local IPv6 Address . . . . . : fe80::2c24:31fe:3f57:bd44%5(Preferred)
       Default Gateway . . . . . . . . . : ::
       DHCPv6 IAID . . . . . . . . . . . : 150994944
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-19-41-A4-95-EC-A8-6B-F4-E5-FA
    
    
       NetBIOS over Tcpip. . . . . . . . : Disabled

      My System SpecsSystem Spec

  2. #2


    It could be the network adaptor shutting down to save power etc.

    Have you tried adjusting the Power Options settings in the Control Panel and the Power management tab of the Intel adaptor, uncheck the one that turns off power.

    If these settings have no effect you could have a problem with the hard drive.
    Attached Thumbnails Attached Thumbnails Power Options TURN OFF SAVE POWER.PNG   uncheck power managment.PNG  
      My System SpecsSystem Spec

  3. #3


    Norway
    Posts : 6
    Windows 8.1


    Thanks for taking the time to answer.

    The computer is connectable over the internet, so the network card is not turning itself off.

    To be clear:

    I can always connect to the computer using its internet IP (and port forwarding on my router): 84.208.151.XXX

    I can only connect to the computer using its internal IP for a couple of hours after boot: 192.168.1.XXX
      My System SpecsSystem Spec

  4. #4


    I had the same issue. Could connect to and from the machine on reboot, could browse network from machine and surf internet but couldn't connect to the machine after variable amounts of time. After turning off power management as above I haven't had the issue again.
      My System SpecsSystem Spec

  5. #5


    Norway
    Posts : 6
    Windows 8.1


    Thanks to both of you, chev65 and cyberSAR. I have just disabled all kinds of power saving for the network card.

    I just rebooted, so now I'll have to wait for a few hours to see if it works.

    I still have to say I find this solution weird, if it works. I cannot wrap my head around how power savings would be able to turn off the network card in such a way that it only affects the local network and not connection to the internet.
      My System SpecsSystem Spec

  6. #6


    Quote Originally Posted by bjarteao View Post
    I still have to say I find this solution weird, if it works. I cannot wrap my head around how power savings would be able to turn off the network card in such a way that it only affects the local network and not connection to the internet.
    I know what you mean. Really not sure why but I was going nuts and figured I would try it and it worked. That machine was on a wireless nic so that may be a little different than your situation.

    Wishing you luck.
      My System SpecsSystem Spec

  7. #7


    Norway
    Posts : 6
    Windows 8.1


    It didn't help to disable power saving, unfortunately.

    I'll give it another couple of days to see if anyone else have any suggestions, and then I'll reinstall Windows. I'm guessing it is some weird setting on the computer that I have accidentally changed, since none of my other Windows 8.1 computers have this issue.
      My System SpecsSystem Spec

  8. #8


    Posts : 4
    Windows 8.1


    bjarteao, did you ever figure this out? I'm having the same problem. Windows 8.1 computer disappearing from the network (of mostly windows 7 and Vista computers) after anywhere from a few minutes to a few hours. Disabling power saving had no effect. Rebooting fixes the issue (temporarily).
      My System SpecsSystem Spec

  9. #9


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    Does it happen when the remote computer uses 100% cpu or close? Could be it drops the connection because of it, and then that in turn screws everything up because computers think they are still networked (but in reality they're not) and Windows won't allow the connection again because of it.

    It's a working theory of mine with evidence to support (but not proven/thoroughly tested yet.)

    You could play around with setting which computer is the master browser, as in making one of your machines always it as long as it's on.

    Info: Specifying Browser Computers

    More info: How to Determine the Master Browser in a Windows Workgroup | Scottie?s Tech.Info
      My System SpecsSystem Spec

  10. #10


    Quote Originally Posted by Guanaco View Post
    bjarteao, did you ever figure this out? I'm having the same problem. Windows 8.1 computer disappearing from the network (of mostly windows 7 and Vista computers) after anywhere from a few minutes to a few hours. Disabling power saving had no effect. Rebooting fixes the issue (temporarily).
    You could try turning off the other power opttions via the power option settings in the Control Panel.
    Attached Thumbnails Attached Thumbnails Power Options TURN OFF SAVE POWER.PNG  
      My System SpecsSystem Spec

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