Thanks all for your help and in the finish I downloaded and installed the program again and I now have my green grass on the terrain
Regards
Mike

I have MSTS installed in root directory folder C:/0001MSTS which worked fine on my desktop!

I have started a new route and when I load this ready to start all the terrain is black!!!! Could some kind person explain where I have gone wrong please. Brand new laptop running Windows10 64bit and 512GB ssd hard drive also both UMD and GForce graphics on board. If I load one of MSTS basic routes ...

That's brilliant, thanks a lot.
Mike