Windows 8.1/Server 2012(R2) has some sort of classic Start Menu built-in.
Well, it's not a GUI thing, it's just a folder with all standard shortcuts, similar to "All Programs" menu in Windows 7.
How to get it?
1. Right click your taskbar and Toolbars -> New toolbar
2. In Select Folder windows nawigate to C:\ProgramData\Microsoft\Windows\Start Menu\Programs and click "Select Folder"
That's it! Now you have "Start Menu" on your taskbar.
