I had the same issue when I upgraded to Windows 8.1. Turning off Secure Boot in the BIOS worked but my desktop displaced Secure Boot problem in lower right corner. I turned secure boot back on and then did the following:
1. Open control panel
2. Select Hardware and Sound
3. Select Device Manager
4. Find Cisco Systems VPN adapter
5. Right click on Cisco Systems VPN adapter and select enable
After doing this I was able to launch Cisco VPN client. I am using an earlier version. I hope that this works for you.
Regarding current situation, I suggest we uninstall VPN client and reinstall it to check the results.
For detailed steps, you can refer to the answer on this link:
If the issue still persists, please try to disable Windows 8.1 driver signature enforcement to check the issue:
Refer to detailed steps here:
Bypass Windows 8 driver signature enforcement
Hope these could be helpful.
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I'm having the same issue after upgrading to 8.1. I was using 5.0.07.0440 x64 vpn client by cisco. Now I can't connect to my work server.
Worked flawlessly in 8.0. How can I roll back without losing stuff? Seems there are no system restore points created before the upgrade which I find frustrating.
Here is the correct answer. I found . You need to install Citrix DNE software. from the link below after installing cisco VPN software vpnclient-winx64-msi-5.0.07.0440-k9. This is required component of Cisco VPN and detailed instructions are on the citrix website.
Make sure download the correct version for 64 or 32 bit.
Following is the link where I found the correct solution and it worked like a charm.
- Proposed as answer by Topert1 Saturday, November 09, 2013 1:17 AM
I had the same problem - Cisco VPN stopped working with the same "driver failure" error message after upgrading to Windows 8.1.
I uninstalled and reinstalled the Cisco VPN. It worked perfectly after that. And it remembered my previous VPN settings.