Memory Leak with Windows 10

Hi everyone,

I am using matlab 2015a with windows 10 and seems that after closing the program it doesn't deallocate the memory. Or at least not all of it. For example, I run matlab, execute a few commandas, load big amount of data etc. Once I finnish I close matlab without cleaning the variables or anything (as I did in the past) and I found myself with 7GB of RAM in use. When the normal in that situation would be 2-3GB. Does anyone else have this problem? Anyone know how to solve it?