How to Install VPN Software in Windows 10

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-services-tech/1127-cisco-vpn-client-windows-10-install-fix-442-failed-to-enable-virtual-adapter.html

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-services-tech/1165-cisco-vpn-client-windows-10-anniversary-update-break-and-fix.html

Step 1. Install “GVCSetup64_4.9.4.0306_EN.exe”
Step 2. Install “vpnclient-winx64-msi-5.0.07.0440-k9.exe”

Step 3 – Edit the Windows Registry – Fix the Reason 442: Failed to Enable Virtual Adapter Error

At this point, the workstation has a fresh installation of the Cisco VPN Client, but will fail to work and produce the well-known Reason 442: Failed to enable Virtual Adapter Error.

To fix this issue, follow the steps below:

1. Open your Windows Registry Editor by typing regedit in the Search Windows area.
2. Browse to the Registry Key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA
3. From the window on the right, select and right-click on DisplayName and choose Modify from the menu. Alternatively, double-click on DisplayName:

For Windows 10 32bit (x86) operating systems, change the value data from “@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” to “Cisco Systems VPN Adapter”.

For Windows 10 64bit (x64) operating systems, change the value data from “@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows” to “Cisco Systems VPN Adapter for 64-bit Windows” as shown below:

The registry key now shows the correct DisplayName value data: