I Am Using Dell Inspiron 5577 Which Has 8GB DDR4 RAM And 7300HQ Processor.. I am using a 5400RPM HDD..Laptop Does't lag a single time during work.. But when I browse internet on Chrome or Mozila, it lags too much like it's a laptop from 2005.. I am unable to detect the problem.. I am using Windows 10 Home Edition, I updated windows, not worked.. checked ram usage during browsing, It rarely goes upto 50% of current RAM.. even tried other browsers..same thing happens.. i open up multiple tabs.. lags.. even on single tab it lags very bad...