I upgraded to Windows 10 back when the release was came out. I bought a Norton Antivirus product a few days ago in order to do some school work since my school recommended we have antivirus software. Ever since I downloaded the antivirus software something called Windows SmartScreen stopped working. Every time I try to download a product from FireFox, Norton warns me that this SmartScreen can't be found so this product can't be downloaded. I can't CTRL+Click a link that was given to me in Microsoft Word. Windows 10 Cortana won't show interests or news feeds anymore even though she is on. I don't know what to do.