If you are having issues using Cisco AnyConnect on Windows and are getting errors such as:
“Connection attempt has failed”
“AnyConnect was not able to establish a connection to the specified secure gateway”
then be sure to confirm you have stopped or disabled the Windows Internet Connection Sharing (ICS) service.
Also, make 100% sure you haven’t shared the wireless device itself.
Related Post: Lenovo laptops have a HotSpot feature that requires ICS (see Lenovo Support Article).