Microsoft has brought back and revamped the Start menu for Windows 10. If you still prefer, say, the Windows 7 classic Start menu, good news. Start menu replacement apps we used to tweak Windows 8 also work in Windows 10.
The screenshot above from How-To Geek is the modified Windows 7-style Start menu, thanks to the Classic Shell program, which is highly customisable and free. Besides customising the Start menu to one that you might be more familiar with, one neat feature in the Classic Shell menu is that there's a quick link to the new Windows 10 Start Menu. So if you ever need to access something that's on the other menu, you can do so in an instant, before the menu changes back to your preferred menu.
Check out the post on How-To Geek for more information on installing and configuring Classic Shell on Windows 10.