We currently offer a massive range of downloads for FSX, as well as older flight simulator add-ons for the ever-popular FS2004, FS2002, CFS3 and now becoming ever popular with dediced virtual aviators is Laminar Research's X-Plane series.
I've read this from a free download this morning, so I thought I'd post it on here for those that dont know.
Dual core processors: FS9 allegedly doesn’t take advantage of the second processor.
But here is a neat trick how to force FS9 make use of both processors on a dual-core
system: Start Flight Simulator, load your flight in windowed mode, then press
Ctrl+Alt+Del to open the Windows Task Manager. Click the "Performance Tab" and
observe that FS9 is only using one processor. Unless you have tons of other programs
running, the left window will show a heavy load, the right graph a very low load. Click on
"Processes" and look for "fs9.exe" (if you click on "Mem Usage" it should be the first or
last item). Right-click "fs9.exe" and select "Set Affinity". Remove the check mark from
one CPU. Close the window, then repeat the process and select both CPUs again. FS9 will
now spread the workload over 2 processors. You should notice
a marked difference in performance. If this does not work on your PC, contact Microsoft
Support for the optional "dual-core hot fix". This should work also for fsx