http://www.lineage2c1.com/download.php
Also many of our guides help to solve many bugs:
Windows support - Game Utilitys
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But if you tryed all , and nothing from forum can help you. I could enter in your computer and check myself what happend
please download Teamviewer ejecute it click on "Run" it will start and you can se a ID and a password send it to me via PM

regards Lineage2c1 support