When I cold boot my Win 10 system, I note a new desktop shortcut for “Webroot” - whose link is to open a file “C:\Programs\ShellExtension.dll.  Every time - despite my deleting the shortcut before shutting down.  What’s worse, as part of the bootup process, I always get a  pop up box “ How do you want to open this file? Internet Shortcut ShellExtension.dll .”

How do I prevent the shortcut creation and the bootup message?  Many thanks.  Peter