What you have there is a low-power netbook CPU, not really designed for number crunching.
Here's a guide if you want to try; http://lifehacker.com/5842094/speed-up-your-low+powered-pc-or-netbook-by-overclocking
Risk is inherent when you increase the CPU speed and other components above recommended settings;
"There are, of course, some downsides to overclocking. Not only can it make your computer less stable if done improperly, but it can also damage your processor if you push it too hard."