RoyD
I have 2 Windows 8.1 x64 notebook computers that have service loss and lockups due to Kaspersky Internet Security. When the 64-bit version of the version 2.3.4-I603 client is used the VPN tunnel connects but when an RDP session is initiated the target computer gets locked up and the connection keeps dropping.
Both of these computers previously used the 2.3.2 Open VPN client with no problem. If I know what is different about these two versions I could try tweaking the KIS configuration.