First , after you try all the availbe options and nothing work , Put the compatibility mode in Windows 7 mode, and you will be marked on the system administrator and that's all up to here. About the video card, check that it is in the most up-to-date state. Now go into Display Settings -> Advanced Display Settings -> Display Adapter Properties -> Select the "Monitor" tab -> and change the screen refresh rate from 59Hz to 60Hz and press Apply. Now try to run MapleStory in administrator mode, Its should be work now , if dosent try to reset PC and run it again , if its still not work , post here your problem , and i will try to help . I had this problem for 3 days , and i was searching a solution for 3 days , and found it now , i use Win 10 . Good Luck. !