Random FPS drops.


Dec 26, 2012
Hey, I will go straight to the point. When I play WoW I get random FPS drops even when its not in high populated areas and I wonder what is causing this and its really annoying. It drops from 60 to 15-20 and its very hard to play then. Some help would've been so awesome. I'm playing on a little old laptop though but it shouldn't happen like this.
Some info about the computer:
Directx11 version
8192 MB RAM
BIOS: InsydeH2O version V1.27
Prossesor: Intel(R) Pentium(R) CPU P6200 @ 2.13 GHz (2 CPUs), ~2.1GHz
System: Acer Aspire 5742G

I'm not an computer expert so it will take some time for me to understand! I would really appreciate if any of you could solve this problem!!! =D =D =D

Thanks in advance!