We’re investigating reports that Bitdefender-powered Managed Antivirus is causing an issue which prevents users from logging into their local profiles. The issue has been raised with Bitdefender as a priority and we’re working with our partner to resolve the problem as soon as possible. A reboot will temporarily take care of the problem; however, the next scan will cause the issue to occur again. We’ll provide updates on our progress as we have new information to share.