On Windows 10 latest version, if you use ccleaner, settings get deleted inside BD 2019 Total Security. Threat Defense. Advanced options. All is set to NULL after using PC-Cleaning tools.
Regards,
DI
PS i wanted to mention, that you are good guys, reading posts in here. The Zotac Software i use is now "legal" set as default. I wanted to mention that. I will buy next time again Bitdefender Antivir products.