Has folk complaining about memory use as well. Are you using Chrome as well as BD?
Curious if others experienced massive system memory drains the past month - start of July 2018? ie, Memory usage climbing to near maximum levels of 80-90+ % typically after browser use. After diagnosing by checking new software installs, internet cache/ temp files, restarts, software updates, it gradually dawned that Bitdefender security suite may be the problem even though while checking its processes its memory usage was low as normal when not updating. Nothing else seemed to be the culprit after days of checking system behaviors and as it seemed by others online assessments of the similar issue, Bitdefender has been having more noted instances of inexplicable high memory usage. So as my subscription was ending with it I followed others who simply switched to new security brands with reputations for low memory impact while active and sturdy security - problem solved immediately thereafter the bit defender uninstall and the new security install.
Bitdefender worked all round very well until this recent inexplicable issue which more folks seem to be having now. It reminds me of the catastrophic reputation Norton's had a decade ago of system-bloated slowness.
So if you're having mysterious system memory-sucking issues lately, may be this discussion will help resolve what might be the problem.