I am attempting to make a copy of a SharePoint 2010 web application and I can get it to the point where I have imported the content from the source site. At this point I hit the login page and that works fine but it then loads the "File not found" error along with a correlation id. Everything I have found on this error seems to point to there being some custom feature on the source site that I don't have on the copy. The question is . . . how can I determine if a SharePoint site has any custom features and what those may be?