We just upgraded our AnyConnect clients to the lastest 3.1 and some XP users were having issues. One PC was able to upgrade to SP3 and it resolved the issue. However, we still have several PC's on XP SP3 and are able to install the client manually, but when you go to connect, it sits at Posture Assessment: Initiating... and eventually gives you "Cisco Scaner has encountered a problem and needs to close". It may also give you the same error with other applications that were already running on the PC. What should our first steps be? If we try to connect in any browser, it gives the same error with cscan.exe.
I have this problem too.