Windows XP/Vista/7 Character bugged

Hi my friend's character (Vina) is bugged. She DCs after a couple minutes of playing. The whole screen freezes and even the monsters in the map become frozen, but when hit by another person they reanimate as normal. They even spawn frozen. As soon as she actually disconnects do the monsters return to normal. We thought this was a patcher bug or internet issue at first, but after trying on 3 different computers, it's only her character that ever freezes and DCs. GMs please help!

 

Another note, when she freezes, it freezes the entire laptop and we're unable to ctrl+alt+del or alt+tab or anything. It's stuck on the frozen screen until we manually hold the power button and shut down.

 

The thing is, we thought it was a problem with the maplestory folder like you said. But we have patched, reinstalled, and tried her logging in on my computer (which is perfectly fine for me). It's a problem with an account I believe. She will freeze up no matter what and at this point she can't train or level up.