We’re aware of a Mabinogi installation issue that Kaspersky anti-virus users are facing. If you are trying to install Mabinogi for the first time, or re-installing a fresh copy of Mabinogi, you will need to temporarily disable Kaspersky during the installation process. We are actively working with Kaspersky to resolve the issue, in the meantime, please try installing Mabinogi with Kaspersky disabled.
The Nexon Team
Mabinogi - Fantasy Life