Hi, Ecsped, Solembum05 is spot on... Let's first try switching the WoWclient from DX11 mode to DX9, and restart the WoWclient. More info here: BosslandGmbH:HelpDesk:Video driver problem If no joy, you've got an interfering program. These articles will walk you through the usual suspects: BosslandGmbH:HelpDesk:AntiVirus InterferenceBosslandGmbH:HelpDeskrograms that Interfere with BosslandGmbH Products cheers, chinajade