most likely there are no option in a laptop BIOS that let's you overclock.
however that still doesn't' mean it can't be done. if you had a Core i5 or core i7 in that laptop you would be out of luck. those are hardware locked to overclocking. (it need to be a K version (like i7-2500K) but i'm sure you guys knew that)
try to search "Computers_model_name overclocking".
you might find a step by step to do it. this last laptop i had, i needed a specific older version of a specific overclocking tool in order to make it work.