Well now it is going to index every word from every file on your computer and return results based upon your key word searches I guess. while supposedly never allowing that index or the searches of those indexes to leave your machine. Seems like a scary amount of data for it to be scanning and hoping it never gets shed from your local machine... But I guess that's why you should modify the index to not scam certain locations.... Like say your PDF of your last 16 years of tax returns