The game would need some patching after a reinstall, is this patch process successful?
Also run the (windows only) configuration exe C:\ryzom\ryzom_configuration_rd.exe and turn down all graphics to minimum check that you have selected Direct3d, disabled all advanced display functions, disable sound and run game "Windowed" in say 1024x768.
Also run the (windows only) configuration exe C:\ryzom\ryzom_configuration_rd.exe and turn down all graphics to minimum check that you have selected Direct3d, disabled all advanced display functions, disable sound and run game "Windowed" in say 1024x768.