That happened to me as well, try this cause this is what i did. Go onto ur KO launcher from ur desktop and right click, then go to the properties. You then go to the compatabilty option at the top. If u have a check mark on the compatability option then turn it off. Restart ur computer then see if it works. If not, then go into ur knight online folder under program files. There are 5 files that can be checked to see if u have a check mark on the compatability. Autoup.exe, KnightOnline.exe,KscViewer.exe, Launcher.exe and Option.exe. Go into thier properties and uncheck the compatability check marks if there is any. If this doesn't help then im sorry but if it does thank me later
