After reading excellent reviews, I decided to buy the JS4100.Does anyone know what causes these flashing squares in the JS4100 while using the VC?Thanks for the help.Update: I think I resolved the issue.

Hello Jose,I believe this is a well known problem with the J41,So you are not alone.I had a similar problem [prizm light effect] and was able to cure it by reducing my Bufferpools in the FSX cfg. file.Hope this helps.Cheers!

Thanks for the input. The plane is a beauty!Now I understand why even the DVD purchase requires an on-line activation.It's an inconvenience for me as a paying customer, but I found out after I bought the software.

Was not activating the aircraft causing your issue?