I've uninstalled BD Total Security 2017 without any problems and clicked "Reboot". After a restart, my Windows 10 security - firewall - kicked in and I was not able to access any network or the Internet. I've shut down my Windows Firewall and downloaded Bitdefender Total Security 2018 from the BD Central web-site, by logging in and clicking on "Install Bitdefender". I would say the new BD 2018 has a slightly changed interface but... I forgot about the issues between Sandboxie and Bitdefender. I've put all Sandboxie's executive files as added rules for BD Firewall, but I was not able to start using Sandboxie. I've turned off Virus Shield but could not use Sandboxed browser anyway. I was getting a pop up message from Sandboxie. Next, I've put all those Sandboxie executive files into BD's "Advanced Threat Defense" whitelist. Now I'm not getting any Sandboxie's pop-up messages but I still cannot use sandboxed Firefox or Chrome. It starts and immediately terminates browser, but... I can use any other Sandboxed apps/software like Privazer, Ccleaner, Acrobat Reader, etc... Why did I decide to update BD so soon? With all BD 2018 services off, I'm able to use Sandboxie.