High CPU usage

Specs for my system: Laptop - Dell Inspiron 15r SE 7520 CPU - Intel Core i5-3210M @ 2.50 Ghz (3.01 w/ Turbo boost), 2 Cores, 4 Logical processors Ram - Gkill 8 gig single stick (aftermarket) OS - Win 7 Home Premium HDD - 1TB So, DCPs & ISRs are eating up close 15-30% of my CPU cores at any...

Hi. I have an HP 630 Notebook, core i3 2.40ghz. Whenever I use DISM, or other apps like winreducer, rt 7 lite or when my cpu usage goes more than 20%, or I start playing some hd videos, the fan starts to spin loudly, resulting in a thermal shutdown. what should i do? it' a good fast laptop, but...