will this laptop run fsx at full settings
You have 4gigs ran but almost 2 gigs are shared memory for your card-see link.
That means your running Vista on a little over 2gigs ram.
You'll get medium if you take it easy on AI and autogen.
Laptops at $2000 or more can't run FSX full out...yet.
We are now at the point that desktops can run them close to full out without AI add-ons like Ultimate Traffic.