Alwil window

About a week or so ago, a window with the Alwil folder started popping up on my display (see attachment). If possible, I want to get rid of it.

Can anyone suggest a procedure that would eradicate this window?

a reinstall may help

follow instructions and run this tool for all avast versions you have had installed http://www.avast.com/en-eu/uninstall-utility

then resinstall http://www.avast.com/en-eu/download-software