[VISTA]can't past the launcher screen but no errors!

everytime i click game start in the launcher,there's nothing happen.the launcher only closes with no errors included but the game wont start.i already uninstalled and reinstalled the RO2 several times,and i also restart my pc everytime i uninstall and reinstall the game.what am i supposed to do to play the game?

make sure in the system folder there's a ragii.exe

sometimes your antivirus might just delete it without notice.