Go to Start, My Computer, Local Disk (C: ), then the Nexon folder should be right there. Open that and then open the CA folder. Scroll down past the other folders and look for "MSVCR100.dll". If it's there, delete it. Then go back out to the C: drive. Scroll down to the Windows folder. Open it and find the system32 folder. Open it and look for the same .dll and delete it if it's there. Then go back out to the Windows folder. sysWOW should be right under system32. Open it and look for the same dll and delete it if it's there.
After doing this, go to http://www.dll-files.com/dllindex/dl...shtml?msvcr100 and download the ZIP file. Extract it to the desktop. Right click it, then click Copy. Go to each of the same folders, and right click and click Paste in each folder.
sysWOW is only if you have a 64 bit computer with Vista or 7.