In case anyone can help.......
I downloaded and installed the Forza 7 Demo, just to see what it is like on PC (I have it on xbox).
A warning came up on opening the programme stating that an unsupported cpu had beem detected and that the game may not work.
I have an i7-7820HQ and I see that the current crop of Alienware laptops run an i7-7700HQ and offer the full game as a perk so I am surprised that this error has come up.
Now to be fair I did try this on my work laptop which is a Precision 5520 with the quadro M1200 and 16gb ram. So hardly a gaming machine and if the error had been about the GPU then I wouldn't have bothered with this post.
If anyone can shed light on this I would be most grateful.
Cheerz