Many thanks for the reply. Yes, I have tried the configuration utility and reduced the display to 10% and this does not help! My computer is quite reasonable - a i7 core 920 with 6 GB RAM and a Nvidia GTX285.My default airport is Bristol EGGD with uk2000 Extreme. I also use Ultimate Traffic 2 and REX 2 and Aerosoft AES BAse pack. I also have FSUIPC .Richard Pain