Hi guys. I'm also a maple story fan and have been playing it for quite some time. I think after one of the patches I started seeing the same BSODs that everyone have been seeing and so I've tried googling for the solution using "dump_wmimmc.sys" and so far this topic has been the most helpful out of 3 sites that google shows up with for this issue. I've been reading up on this topic for a while and have tried several things:

Uninstalled and reinstalled maple story.
Uninstalling Norton AV - (This changed the time i get the BSOD after trying to log in to the time i exit maple story).
Reinstalled my video driver (I have a ATI Radeon 9000).

One problem I have though is that when I try to install Catalyst 6.6 for my Radeon 9000 an error pops up saying I need to install a video card first. I looked up information about Catalyst 6.6 and figured there's an incompatability issue with the driver and card. So, I waved the problem off.

After reading several new posts, I've come up with several new ideas.
I have another computer that does not support a graphics card and has only an integrated graphics controlller installed on it. With only that, My brother and I have played maple story for about a year on this computer and I've never seen a problem with it. My laptop which has the Radeon 9000 on it has been the only one with the problems, so I figured from all this that either the video card and/or driver is the problem or the temporary file dump_wmimmc.sys is the only source of the problem and Windows sees the file as a threat to the system and hence the BSOD.

So far I've figured that the only solution is to disable gameguard completely, which is probably what Xenethyl found at those maple story hacking sites.
Other than this we could get together and spam Inca to solve this problem.