It isn’t hard to add UseRas=1. The easiest way to find it is to go by the way of My Computer

Double click My Computer/double click C: drive/ double click/Program files/double click Alwil software/double click Avast 4/double click/Data. Look for the Avast4.ini file, right click on it and choose open. That should open notepad and show everything in that ini file. Then it’s just the same as working with any writing program. Just add the UseRAS=1, under the [InetWD] section, save it, and close. Then you can try the restart and see if it happened to fix the problem. I hope it works for you. Every program, no matter what it is, has a bug in it somewhere. It just takes time to get it fixed. Look at Microsoft Windows for instance! ;D