Geoff88

Thanks for those inputs. From what you have said, and since the program is working quite happily on many other computers including the development machine, I have a suspicion that it may be the drivers and not Windows after all.

Is anybody aware if Win 10 has changed its API in regard to printing? My flagship program has been running for 20yrs but suddenly 2 customers who have purchased new HP printers have found they cannot print from it. Then yesterday another custome found they could not print to an older Canon printer despite loading the newest drivers and also despite other programs being able to print. Has everybody moved over to GDI printing? and if so is there a Delphi 5 solution?