I have purchased HP ab253cl laptop from eBay.in Which works perfectly what I want. But I want more smooth working as I have 12Gb of RAM present in it. I have so many times checked when I am using it extensively.... Even when only 3-4 GB RAM is using.... I am not a gamer .... I love browsing,coding,programmer,editing. Someone tell me what can I do to use all my RAMS and make my laptop smoother.