Here are the website's requirements:
System Requirements
- Windows XP SP2 / Windows Vista
- Processor: 1.0 Ghz
- RAM: Windows XP SP2 - 256MB, Windows Vista – 512MB
- Hard Drive: 14GB
- Video Card: 32MB DirectX 9 compatible
- Other: DX9 hardware compatibility and audio board with speakers and/or headphones
- Online/Multiplayer Requirements: 56.6 kbps or better for online play
I've got all those stats beat. The only thing I don't understand is the video card.
Ok, I've been using Microsoft Flight Simulator ever since version 4.0. Let me tell you what I've learned. The minimum requirements for MSFS are BARE minimums. Do not expect to get anything but the sh!ttiest performance out of it. MSFS is a VERY resource and processor intensive program.
Your processor and RAM should be ok, but even a 2.2 GHz will probably run slow (I have a 2.4 GHz with HT, haven't tested out FSX. FS2004 runs pretty nice with my 1 GB RAM). You want more RAM. MSFS uses more RAM than any other program I've ever used. It's unreal. The more it has, the happier it and you will be.
As for your video card, this is SUPER critical as well. They no sh!t mean a DirectX 9 capable video card. Anything less and you won't see the newest graphics features and it won't run as fast. Trust me, I know this. My card is DirectX 8 (with SOME DirectX 9 capability, though not all), and I can't really use all the features of Call of Duty 2. Look at your Device Manager and tell us what your video card is. Are you using a laptop? If so, you're going to be hurting, guaranteed.
Ask away, I've been using their MSFS product for years.