Anyone know how/why?
No matter how much I dust, it eventually comes back and piles up.
I bought a new keyboard and I clean it every now and then since it always collects dust fast

and the area around my computer tower gets dusty

Probably dead skin.

Indeed. Your skin flakes off (and turns to dust) so rapidly that you replace your entire epidermis every 2-4 weeks.

this

or you just have windows in your room, which bring dust particles in from outside through a draft in the window.

arnt you the kid bitching about spiders not to long ago?

Change the air filter! Often!

Move computer further away from the vent?

Move out of the desert?

its piling up faster by your computer because your next to it all the time dungeon master

My windows are always closed.
And dust can be many things.
They mostly collect around my computer cables/wires and power cords :[

Things get dusty, the solution is dusting them when they get dusty. Hope this solves your problem...