Error codes and Event ID numbers?

Why is technology so difficult! Where do you find a complete list of these code numbers? It seems like nobody wants to shrare them, or is it that whoever programmed these OS just made tem up as they went? I would think that somebody by now would produce a list of error code number for each operating system with explainations on what caused the error and the simplest solution on how to fix it? Sombody please explain this to me I have been searching for years on the net for a list of windows number codes and haven’t found one yet. Any repply would be greatly appreciated thanks the mob