I presue than screen talked about being uncertified. THere are many uncertified drivers that have not been checked by microsoft and are theefore uncertified. However, they have usually ben tested by the manufacturer and so will work fine. Go ahead and install. If you are unsure, set a system restore point before installing this driver - start/programs/accessories/system restore/ set restore point. This will allow you to reset you system to how is was before you installed the new driver with minimal fuss.