Worked fine with Avast 16 failed after upgrade to Avast 17.2 on Windows 7 Pro,
previous av was AVG which was properly removed then ran cleanup tool and installled Avast 2016
IE11 browser can access remote SonicWALL VPN url it opens ok, when you click on Terminal Services shortcut for remote desktop mstsc.exe it opens and fails to connect to 127.0.0.1:3389.
Turning off WEBSHIELD component fixes issue.
Tried to exclude mstsc.exe and SonicWALL url from webshield with no luck,
also reset winsock , ip stack, and did flushdns and rebooted still no luck.