We discuss what you can do if you see the Unsupported 16-bit Application error on Windows 11/10 PC, after knowing why you see this message.

64-bit Windows 10 no longer supports 16-bit applications. Some older software depends on old Windows libraries that are no longer included with Windows 10.

It is, though, important to know whether you are running a 64-bit or 32-bit version of Windows when performing certain tasks on your computer.