laptop hangs

Whenever I open up my task manager especially when my laptop is hanging due to some unresponsive apps, it seems that my task manager will also become unresponsive. I remember back in those days when I was using my old laptop, task manager had always been helpful when it comes to lagging issue...

http://pcpartpicker.com/list/MXv9cc <--this is the part list to my first build. Ive just decided to switch from Console to PC and wanted to build a good gaming computer. Anything I should tweak/change? I want to stay around the same budget.