Windows 95, which introduced the Start menu to the world, just celebrated its 20th birthday! The feature was an instant hit, becoming a core component of Windows operating systems. Well, it was removed in the mistake that was Windows 8, but you should know by now that the Start menu has been reincarnated for Windows 10.
In Windows 10, Microsoft tried to polymerize classic elements of the Start menu with modern elements, such as live tiles, to create a chimeric new iteration of the Start menu. While the "new" Start menu is one of the main "new" features in Windows 10, it's not exactly perfect.
To help you get acquainted with the new Start menu in Windows 10, we have already shown you how to remove live tiles and resize the menu, how to bring back user and content folders, and how to use and customize it. But what if you're just nostalgic about the good old days of the classic Start menu and don't want to bother with the new Start menu at all? Fortunately, there is a free solution available to help you out.
Source:
How to Get the Classic Start Menu in Windows 10 « Windows Tips