Solution to old driver files not working in Windows 10?!

While I was failing to install my Dell 2330 printer before succeeding, I had gone to one of the Dell driver folders in the temp folder made by the Dell driver program and tried to install all 130 INF driver files to get the drivers to show on the Windows manual install list. This had worked in Win XP pretty well. But Win 10 wasn't helping. All attempts to "right click > install" any INF resulted in a "not digitally signed driver" error. No override option. I believe this is one reason that the Dell driver files for older printers are failing to install and get printers to work.

SO... DELL TECHS... GET ALL YOUR OLDER NON-WIN 10 DRIVER INFs DIGITALLY SIGNED AND IT'S LIKELY MANY INSTALL ERRORS AND FAILURES IN WINDOWS 10 COULD BE SOLVED!