FSX works fine under win7 64 or 32 bit but you cannot run 16 bit applications under 64 bit. Had an old cad progamme that wouldnt install under 64 bit because the installer is 16 bit. FSX must not be installed in the default folder under win 7 it causes security headaches, better on another drive, partition or folder outside of programme files. And you dont need any service packs with accelertion, it has a slightly different ver of sp2.
AMD P2 1090t CPU,4.1 GHZ. 8Gig DDr3 1600 MHz cas 9, ram, Nvidia GTX 560 ti 1 gig Video, Sound Blaster XFI Extreme audio