DISPLAY PROBLEMS

I HAVE JUST INSTALLED UBUNTU ON MY COMPUTER, (I'M USING A ACER FERRARI MONITOR) AND WHILE I START UP UBUNTU MY MONITOR DISPLAYS A MESSAGE SAYING "INPUT NOT SUPPORTED" HOWEVER I CAN SEE EVERYTHING PERFECTLY EXCEPT FOR THE FACT THAT THE MESSAGE BLOCKS MY VIEW AND WILL NOT GO AWAY  , THIS MESSAGE IS ALWAYS DISPLAYED  WHILE MY WINDOWS IS STARTING UP BUT THEN DISSAPEARS AS I ENTER WINDOWS HOW CAN I SOLVE THIS PROBLEM.