Upgrade to Win10 development environment causes errors

I have recently upgraded my development pc to Win10. I copied all my existing Dynamic C 10.72 projects over (from a Win7 pc) but none of them can compile on the new pc, giving obscure errors like ERRNO.H cannot be found, XMEM.H cannot be found, etc. even though they are all there where they always were. Is there a list of project update steps to follow to upgrade to Win10?

Did you run the Dynamic C 10.72 installer on the Win10 PC? What do you see in the “Include Path” tab of your Project Options? It should just have a single line of “.\include” to use the “include” directory for the running version of Dynamic C.