Brand new HP Envy Laptop running Windows 8.1, Bitdefender Internet Security 2015. TB has worked perfectly for two months. Now, all of a sudden, it locks up when I try to delete more than one message at a time. Sometimes it will delete five at a time without a problem, but the next time it will freeze and I have to go into Task Manager and kill it. I have tried booting in Safe Mode with Networking, then running TB and the problem is the same. I downloaded the latest version from the website, even though I have updates set to auto. Any ideas?