Please check the system requirements for Tree of Savior
Flash Player must be installed to run the client properly.
Install Flash URL :
(EXE) https://fpdownload.macromedia.com/get/flashplayer/current/licensing/win/install_flash_player_18_active_x.exe
(MSI) https://fpdownload.macromedia.com/get/flashplayer/current/licensing/win/install_flash_player_18_active_x.msi
Install Latest DirectX URL:
http://www.microsoft.com/en-US/download/details.aspx?id=35
Download the latest graphic drivers :
nvidia   http://www.nvidia.com/download/index.aspx
ati      http://support.amd.com/en-us/download
intel     https://downloadcenter.intel.com/