Hello, I have the same problem : my laptop has 16GB of RAM and with no application open else than Firefox, my RAM usage is 52%, and never seems to be less than 40%. Often when I work with 3-4 applications at the same time, I get a black screen and I am forced to reboot.
In the Task Manager, it seems like I have a gazillion small processes that add up and I don't really know which ones to remove. Even if I end them in the Task Manager, they come back after I've rebooted.
It's a painful problem and Microsoft should really fix it because it's impossible to work in those conditions.