In order for you to play Microsoft Flight Simulator X: Steam Edition on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows® XP Service Pack 2 or later
Processor (CPU):
2.0 Ghz or higher (single core)
Memory (RAM):
2 GB RAM
Graphics Card:
DirectX®9 compliant video card or greater, 256 MB video RAM or higher, Shader Model 1.1 or higher (Laptop versions of these chipsets may work but are not supported. Updates to your video and sound card drivers may be required)
DirectX:
Version 9.0c
Network:
Broadband Internet connection
Storage:
30 GB available space