I have a HP laptop with an i3@1900mhz. 8gb ram, 750gb hard drive, onboard intel graphics with 1gm ram. I avg 30-50fps in FSX with AS16 and ASCA and a few addon planes. I'm happy with this setup. I think you will be as well.
Welcome aboard, AD
Sounds like a Win 10 issue, when you did the reinstall did you do this after a reformat or on top of the original install?
Something else, do it freeze while using any other programs?