Ouch. Your processor hurts your gameplay really bad.
Not to mention you're also using Onboard graphics. Change that now.
Upgrade your processor and your video card.
For optimum performance in Flight Simulator X, you'd need at least a Radeon 5770 along with a Q9400 processor. (Because MFSX likes Quad Cores better than a good video card.)
PS. We have the same motherboard.