And same for me, first time today...
In my case Firefox stopped working, screen blacked out for some seconds and then Windows reacted again. Checknig Taskmanager I already got the red-warning on RAM usage Feeds using up almost the full 32GB of RAM.
Killing the process and everything turned back to normal for now.
Got an Intel i7-8700, an 1070 NVidia GPU and Bitdefender Antivirus running... the system is usually rock-stable for years in daily use. This must be some update installed recently, as I also did not change the software setup otherwise.
(Zoom updated yesterday... Firefox, Edge and Office 365 did)