Once you have downloaded the client setup file.
Click the option in the file download window.
In the windows, click the 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] -> .
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 button to log into the game.