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Cisco VPN Client Fix for Windows 8.1


If you have upgraded or installed your machine to Windows 8.1 (final) you might have noticed, that the Cisco VPN Client might stop working or you get BlueScreens when shutting down your Windows machine. In my case it was a blue screen that said:


It happened only when shutting down, not when rebooting, because Windows does no longer make a „real“ shutdown. Instead it just does some kind of hibernation. Therefore all drivers have to accept a suspend command. One of the Cisco VPNs drivers seems to be incompatible.

Here is the quick fix, that worked for me and hopefully will work for you.

  1. Install the latest CISCO VPN Client (vpnclient-winx64-msi-
  2. Reboot your Windows 8.1 machine
  3. Download the latest DNE (Deterministic Network Enhancer) from Citrix. It is available here.
  4. Install the DNE
  5. Reboot again
  6. Try if your machine now makes a perfect shutdown

I hope, this procedure helped you to get your VPN up and running again. Feel free to add your comments below.

3 Comments so far

  1. Jimmy on Oktober 22nd, 2013

    I’m still getting the 442 error about the virtual adapter. I have done the registry key fix as well as making sure internet connection sharing is disabled, any ideas?

  2. pcfreak on Oktober 23rd, 2013

    Hi Jimmy,
    do you have the latest version of the VPN Client? If not, it could possibly be this problem http://www.petenetlive.com/KB/Article/0000693.htm or you should stop the „Internet Connection Sharing“ service.

  3. Marco on Dezember 23rd, 2013

    It works! Thank you very much.