UPDATE: It appears that Microsoft has removed this ability in later versions of Windows 11 builds.
Switch back to Classic Windows 10 Start Menu in Windows 11
To switch back from the Windows 11 Start menu to the classic start menu, you could use this simple Registry Editor tweak. Press Win+R to open the Run window and type the command regedit in the Run field. Hit Enter to open the Registry Editor window. Then, navigate to the following key: On the right-pane, right-click anywhere in the open space and select New > DWORD (32-bit).
Name the new DWORD (32-bit) entry as Start_ShowClassicMode and hit Enter to save it. Now, to change the Windows 11 Start menu to the classic Start menu, double click on the Start_ShowClassicMode entry and change the value of the Value data from 0 to 1.
Click on OK to save the settings and reboot the system. You will see the classic Windows 10 style classic Start Menu on Windows 11. TIP: You can also move Windows 11 Start Menu to the left side.
Switch from the classic Start menu to Windows 11 Start menu again
In case you wish to revert the changes you made earlier, simply open the Registry Editor and go back to the same path.
Now, to change the classic Start menu to the Windows 11 Start menuDouble click on the Start_ShowClassicMode entryChange the value of the Value data from 1 to 0.Then, right-click on the Start_ShowClassicMode entry and select Delete.Reboot your system to apply the changes.
Read: How to get Windows 10 Explorer back in Windows 11.
Why would you want to change to the classic Start menu from the Windows 11 Start menu?
The reasons are simple: Let us know if this article was helpful for you.