After installing KB3021952 MS15-009: Description of the security update for Internet Explorer: February 10, 2015, Cisco AnyConnect Secure Mobility Client was failing to start with following error message :
Fortunately, with latest published updates from Microsoft which includes KB3032359 Cumulative security update for Internet Explorer: March 10, 2015, will also fix this behavior (problem).
Failed to Initialize connection subsystemIn order to fix this behavior without uninstalling the KB3040335, vpnui.exe should be set to run in Windows 8 compatibility mode.
Fortunately, with latest published updates from Microsoft which includes KB3032359 Cumulative security update for Internet Explorer: March 10, 2015, will also fix this behavior (problem).