DC after entering PIC

[Anime]

I've gotten this error a few times, the following isn't a guaranteed fix, but it might fix it

You can either:

• Close some unused processes
  
• Edit your MapleKey.exe compatibility settings
       1. Right click your MapleKey.exe
       2. Click properties, a new window will appear 
       3. Click the compatibility tab 
       4. Tick any setting, hit apply, and try running the client (This is all about trial and error)
  
  
  EDIT: Your disconnection after entering your PIN should be fixed