WAN miniport drivers vanished,can't reinstall PLEASE help.


  1. DamnWanMiniPort
    Posts : 1
    win7 32b
       New #1

    WAN miniport drivers vanished,can't reinstall PLEASE help.


    Hello, this is my first post i don't have much time to write it so i will go straight to the point!

    Today while i was trying to connect to the internet i discovered that my network card and some other components showed up in device manager with the following message "This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)""

    I don't know why this has happened , i did nothing to cause it, no recent installs or other modifications it just happened for no apparent reason.

    I have managed to install my network card and 2-3 other things from the Network category back but i still have a lot of WAN miniports that i can't install , i have been trying for more than 5 hours to resolve this issue with no success.

    I need the WAN miniports to be installed in order to connect to the internet since i have to dial a connection, please if someone could guide me in resolving this issue it would be a VERY big help for me since i don't want to reinstall my windows .

    I have attached a screen shot from the task manager with the WAN miniports that still have the error31 message.

    Thank you in advance !
    Attached Thumbnails Attached Thumbnails WAN miniport drivers vanished,can't reinstall PLEASE help.-untitled.png  
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  3. seavixen32
    Posts : 7,730
    Windows 7 Ultimate SP1 64-Bit
       New #2

    Welcome to Windows Seven Forums.



    Several options open to you:
    1. Install latest chipset drivers from your motherboard manufacturer and/or computer manufacturer.
    2. System restore to a point in time before the problem occurred.
    3. A repair install of Windows 7: Repair Install
    4. A clean install of Windows 7: Clean Install Windows 7
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  4. quickdraw2011
    Posts : 525
    windows 7 home premium 64 bit
       New #3

    Not sure, if this will help?

    Here are the steps to re-install WAN miniport devices

    Step 1: Uninstall WAN Miniport Devices


    1. Open Device Manager (devmgmt.msc) and on the view menu select Show hidden devices

    2. Under Network adapters, you will see WAN miniport devices (IP, L2TP, Pppoe, PPTP). If you don’t see these, skip to the Step 2 section

    3. Open Registry editor (regedit.exe)

    4. Browse to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318} and Export this registry subkey

    5. Click each of the registry subkeys under this key. Look up the data value in DriverDesc. Find the subkey that corresponds to the miniport device for example, WAN Miniport (IP).

    6. Right click the subkey (for example 005), and then click delete. Click Yes to confirm deletion

    7. Go into Device Manager and right click the miniport device that corresponds to the subkey that was deleted. Select uninstall and confirm uninstallation

    8. Repeat this process for all miniport devices that you need to uninstall

    Step 2: Reinstall WAN Miniport Devices


    9. Find netrasa.inf in c:\windows\inf

    10. Make a copy of this file (netrasa.bak)

    11. Open netrasa.inf and comment out the following section:
    Before

    [ControlFlags]
    ExcludeFromSelect =\
    SW\{eeab7790-c514-11d1-b42b-00805fc1270e},\
    MS_IrdaMiniport,\
    MS_IrModemMiniport, \
    MS_L2tpMiniport,MS_PptpMiniport,\
    MS_PppoeMiniport, \
    MS_NdisWanBh,\
    MS_NdisWanIp,\
    MS_NdisWanIpv6,\
    MS_NdisWanNbfIn,MS_NdisWanNbfOut

    After

    [ControlFlags]
    ;ExcludeFromSelect =\
    ; SW\{eeab7790-c514-11d1-b42b-00805fc1270e},\
    ; MS_IrdaMiniport,\
    ; MS_IrModemMiniport, \
    ; MS_L2tpMiniport,MS_PptpMiniport,\
    ; MS_PppoeMiniport, \
    ; MS_NdisWanBh,\
    ; MS_NdisWanIp,\
    ; MS_NdisWanIpv6,\
    ; MS_NdisWanNbfIn,MS_NdisWanNbfOut
    12. Start the Add Hardware Wizard from control panel

    13. Select Yes, I have already connected the hardware, then Next

    14. Select Add a new hardware device, then Next

    15. Select Install the hardware that I manually select from a list (Advanced), then Next

    16. Select Network Adapters, then Next

    17. Select Microsoft in the Manufacturer section and then on the Network Adapter, select the desired WAN Miniport device, then Next and Finish the wizard

    18. Repeat 13 – 18 for each device you are re-installing

    19. After the devices are re-installed, reboot the system

    20. Run netsh int ip reset c:\resetlog.txt and reboot the system again (Resetting the TCP/IP stack)

    21. Check the network connections in device manager and in Network Connection (ncpa.cpl)

    22. Delete c:\windows\inf\netrasa.inf and rename netrasa.bak to netrasa.inf
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  6. chev65
    Posts : 8,870
    Windows 7 Ult, Windows 8.1 Pro,
       New #4

    I would think that those are system files.
    If they are system files then you can get them back using sfc/scannow, follow the directions for this in the link below.
    SFC /SCANNOW Command - System File Checker

    Updating your network driver might also be a good idea.
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  7. Hitman0997
    Posts : 1
    Windows 7 Home Premium 64bit
       New #5

    quickdraw2011 said:
    Not sure, if this will help?

    Here are the steps to re-install WAN miniport devices

    Step 1: Uninstall WAN Miniport Devices


    1. Open Device Manager (devmgmt.msc) and on the view menu select Show hidden devices

    2. Under Network adapters, you will see WAN miniport devices (IP, L2TP, Pppoe, PPTP). If you don’t see these, skip to the Step 2 section

    3. Open Registry editor (regedit.exe)

    4. Browse to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318} and Export this registry subkey

    5. Click each of the registry subkeys under this key. Look up the data value in DriverDesc. Find the subkey that corresponds to the miniport device for example, WAN Miniport (IP).

    6. Right click the subkey (for example 005), and then click delete. Click Yes to confirm deletion

    7. Go into Device Manager and right click the miniport device that corresponds to the subkey that was deleted. Select uninstall and confirm uninstallation

    8. Repeat this process for all miniport devices that you need to uninstall

    Step 2: Reinstall WAN Miniport Devices


    9. Find netrasa.inf in c:\windows\inf

    10. Make a copy of this file (netrasa.bak)

    11. Open netrasa.inf and comment out the following section:
    Before

    [ControlFlags]
    ExcludeFromSelect =\
    SW\{eeab7790-c514-11d1-b42b-00805fc1270e},\
    MS_IrdaMiniport,\
    MS_IrModemMiniport, \
    MS_L2tpMiniport,MS_PptpMiniport,\
    MS_PppoeMiniport, \
    MS_NdisWanBh,\
    MS_NdisWanIp,\
    MS_NdisWanIpv6,\
    MS_NdisWanNbfIn,MS_NdisWanNbfOut

    After

    [ControlFlags]
    ;ExcludeFromSelect =\
    ; SW\{eeab7790-c514-11d1-b42b-00805fc1270e},\
    ; MS_IrdaMiniport,\
    ; MS_IrModemMiniport, \
    ; MS_L2tpMiniport,MS_PptpMiniport,\
    ; MS_PppoeMiniport, \
    ; MS_NdisWanBh,\
    ; MS_NdisWanIp,\
    ; MS_NdisWanIpv6,\
    ; MS_NdisWanNbfIn,MS_NdisWanNbfOut
    12. Start the Add Hardware Wizard from control panel

    13. Select Yes, I have already connected the hardware, then Next

    14. Select Add a new hardware device, then Next

    15. Select Install the hardware that I manually select from a list (Advanced), then Next

    16. Select Network Adapters, then Next

    17. Select Microsoft in the Manufacturer section and then on the Network Adapter, select the desired WAN Miniport device, then Next and Finish the wizard

    18. Repeat 13 – 18 for each device you are re-installing

    19. After the devices are re-installed, reboot the system

    20. Run netsh int ip reset c:\resetlog.txt and reboot the system again (Resetting the TCP/IP stack)

    21. Check the network connections in device manager and in Network Connection (ncpa.cpl)

    22. Delete c:\windows\inf\netrasa.inf and rename netrasa.bak to netrasa.inf
    How do you comment out the area and how do you save it, mine comes up saying access denied
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