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Error 4-109: Could not initialize the Tunngle network adapter!

Could not initialize the Tunngle network adapter!
Error 4-109


  • The Tunngle client installation has failed.
  • The Tunngle network adapter installation has failed.
  • The adapter installation was manually aborted (see Windows Logo testing).
  • An installed security software has blocked the adapter installation.
  • An installed security software has prevented the setup from creating the new registry entries.
  • An installed security software has blocked the access to the adapter.
  • Your IP settings are corrupted.
  • Your Windows user account doesn't have sufficient administration rights for the adapter installation.


  • If before it was working the best thing is to do nothing and attempt to restart your PC first. If you don't want to reboot, you can also Force Restart.
  • If restarting doesn't work, you can right-click over My Computer, select properties then open the Device Manager and verify, under Network Adapters, if the Tunngle TAP-Win32 Adapter V9 (Tunngle) is installed and working properly. If it's not you can try one of the following:
  • If the adapter is installed, listed in device manager and working properly, we recommend that you properly configure exception for the Tunngle Executables in your security software.
  • If this fails please note that certain firewalls might require additional configuration. More info in the Troubleshooting section.
  • If you think that your IP settings might be corrupted you can try to check the last point of this section.
  • We'd like to remind you that the installation requires administrator rights in order to be successful. If your Windows user account doesn't have enough rights, you can always start the Tunngle client setup by right clicking and selecting 'Run as administrator'.
  • If you get an empty adapter selection dialog please check that the SYSTEM account has Full Control permissions for the C:\Users\All Users\Tunngle (Win 7) or C:\Documents and Settings\All Users\Application Data\Tunngle (Win Xp) folder. To do this:
    • Open the containing folder (e.g. C:\Users\All Users\ for Windows 7).
    • Right-click over the Tunngle folder that appears in the list and select Properties.
    • Open the Security Tab.
    • If the SYSTEM user not there click Edit, Add, type SYSTEM inside the Enter the object names to select input-box and click OK.
    • Select the SYSTEM user and tick the Allow column of the Full Control row.
    • Click OK twice, uninstall, reboot, install, reboot Tunngle.
  • Some members have reported that disabling and enabling back the Tunngle adapter from Network Connections before starting Tunngle might help in some cases.
  • Some members have reported that they had to turn on Windows User Account Control (UAC) and uninstall, reboot, reinstall Tunngle before the adapter was properly recognized (more).
  • If everything else fails please check the Broken Internet Security Suites section.
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