Hello, I have a very strange problem with my mouse. When I enter FS2004 the mouse starts unrelentingly to go down to screen without touching it.Even when I quit the game the mouse is still moving alone. It desappears only when I reboot my pc.I don't have any clue of the problem origin.What is also very strange, is that I have a backup of my flight sim directory and when I replace the directory with the backup, then the problem desappears. But after some hours of flight after quiting the game, when I come back the next day problem with the mouse arise again.I fly essentially PMDG airplane on IVAO network.If someone has any clue how can I diagnose and resolve this issue, I'll be very gratefull.thank's in advance.olivier