Maplestory is the biggest load of shit you can play :shrugThis coming from a person of 3 years playing, 2 4th Job characters, the whole nine yards).
It has a very aggressive anti hack system which can, and does screw up your PC, including the graphics drivers, not to mention your page file sytem thanks to the way it loads the images and giving you blue screens thanks to Gameguard.
If you want to go through life without having to pull yourself up an incredibily steep cliff after spending several thousands of dollars, I suggest you delete it and never play it again. (Life advice, take it from me)
Do a system restore to the day before you installed the new drivers and before you installed Maplestory, then try again.
*This was, and is my only post until something of interest happens*