Cisco VPN on Windows 8.1/10 – Reason 442: Failed to enable Virtual Adapter

To fix:

1. Click Start and type regedit in the Search field and hit enter.
2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA
3. Find the String Value called DisplayName
4. Right click and select Modify from the context menu.
5. In Value data, remove @oemX.inf,%CVirtA_Desc%;. The Value data should only contain Cisco Systems VPN Adapter for 64-bit Windows.
6. Click Ok.
7. Close Registry Editor.
8. Retry your Cisco VPN Client connection.