If you come across the error in the picture below, continue reading.


Step 1: Open Lunar Client's properties

  1. Right click on Lunar Client's setup application.
  2. Click on the "Properties" button.

Step 2: Change compatibility mode

  1. Press on the "Compatibility" tab.
  2. Tick the box that says "Run this program in compatibility mode for". The default should be Windows 8.
  3. Press the "Apply" button at the bottom.