How well will Flight Simulator X run on my computer?

I have a Compaq Presario with 500gb hard drive, 2gb ram, dual core 2ghz intel pentium processor, NVIDIA GeForce 7100 graphics card, and its running Vista Home Premium. It was my grandma's old computer and she got rid of it because the power supply was fried by a lightning strike (I replaced it and the computer runs now). She played a lot of games on it and they seem to run very well. How will FSX hold up on this?