Πώς μπορώ να μεταβάλλουν πλήκτρα λειτουργιών;

I'm into a bit of gaming, and the game in question (GARRYSMOD) requires use of the function keys (f1-f12). however, on my laptop (DELL Inspiron), the function keys trigger schedule such as projector usage and turning off my wifi. Is there a way to disable the actions triggered by the function keys?
My OS is Windows 7
this would reeeeealllllyyyy help me, I've looked on google and could not find a way to fix this.