ZBrushCentral

why dose my memory count count down at the top of the info bar?

I was zoning out this evening and suddenly found myself staring at the top info count bar. I noticed that the Memory counts down on its own regardless of what ever I’m doing or not doing. The free memory running out due to windows sucking the life out of my system, like some digital vampire OS ? Should I be worried, buy garlic and install the Crucifix Build of Linux? :confused: