Flegmatica - I am no PC expert, but when one comes along, the first thing he will ask is some more details about your system. Give us some idea of what you have, for example my old rig is:-
Athlon 3000, 1024Meg of RAM, Radeon 9800Pro graphics card, WindowsXP, Logitech Wingman 3D joystick, TrackIR3, Lockon patched to v1.02