Found the Theme hospital disk while tidying up some old junk, tried installing it from disk and it didn't work. Copied the contents of the disk to a folder on drive C: this worked and saved the game but the resolution was a bit disappointing.
Downloaded corsix th and installed and pointed it to the theme hosp files, error Microsoft visual 2017 not installed. Downloaded and installed Microsoft visual 2017 both versions 86 & 64.
Ran the Corsix th to play the game and its a massive improvement visually but with a different interface.
Had to start again as it didn't recognise any of my saved games
Theme hospital an old but fun game.