Lenovo S12 really suck as multitasking

I just experienced something crappy with S12 ion: the machine went nuts, all wireless USB devices failed to work, and audio playback was super choppy, all because I was listening to iTune while surfing the web. I mean, this is just crazy. Can web surfing really suck up that much CPU power. As it turns out the CPU does go all the way to max everytime I tried surfing the web on S12. And I am not just talking about using Firefox with Truecrypt. Just running regular Internet Explorer caused the CPU went all the way to the max. I think I really should avoid using S12 to surf the net while doing any other task. In fact, I think S12 should be left doing nothing but playing iTune and recording TV. With both iTune on and Windows Media Center recording video, the CPU stays about 40%, which is a more acceptable level.