Once you have downloaded the client setup file.
Click the [Save] option in the file download window.
In the [Save as] windows, click the [Save] option to begin downloading.
After download has completed, start the client installation by double-clicking the client installation files you have downloaded.
In the DOTC Installation Window, click [Next] -> [Start].
Proceed with the client installation.
When the installation is complete, click [Ok] to start your screen resolution check.
Once the screen resolution has been set the client will begin downloading client patch files.
After downloading the client patch files, click the [Start Game] button to log into the game.