I upgraded to Window 8.1 Preview and my Cisco AnyConnect Secure Mobility Client VPN fails to connect. I tried uninstalling, rebooting, and reintalling with no luck. When the Cisco AnyConnect is attempting to connect, it shows "Performing any required updates". Then the AnyConnect Secure Mobility Client Downloader dialog appears saying the AnyConnect client servic is not responding. and then the following alert appears "VPN lcient agent was unable to send a success response to an IPC peer requesting the creations of a VPN connection".
It appears I have to restore back to Windows 8 if possible.