First of all thanks for the replies and sorry for the double post.
So, I've reduced preload radius down to 0 and closed all those updaters and other worthless programs running in the background and it worked! sort of... It now stutters way less then before and I actually was able to takeoff this time. tho there are still some issues whom prevent me from finally pressing the checkout button on the those DCS modules. It takes forever for the mission to load and an eternity to exit back to the menu.
I was brave enough to Alt-tab (which froze my pc for a long while) to view my CPU usage and it looked like DCS was using 1.2GHz only when in the menu.
I remember playing lock-on way back and from what it seems the map didn't really change since in terms of graphics and such, and coming back to this really leaves me puzzled.
Anyhow, I was looking to replace my machine with a notebook and was wondering how would this dell would handle the load. and if not this maybe a different one can.
http://www.dell.com/us/p/inspiron-17r-se-7720/pd?oc=fncwn24&model_id=inspiron-17r-se-7720