I put "InstallStub" in a Google search and it came up with 435 results. It looks as though InstallStub is an Autodialler but for what I don't know. The best thing to do is NOT let it have access to the Internet then keep a close eye on your programs to see if they are functioning correctly. Try the Google search (or any search engine - Google is the biggest)and go through the results until you find out what it is. Hope this helps.