This is what the Most Used section looks like on the Windows 10 Start menu:
Hide Most Used Apps from Windows 10 Start
To get started the first thing you want to do is open Settings. You can do that from the Start menu itself or if you practice keyboard kung fu, hit the Windows Key + I keyboard combo. When the Settings app opens up select Personalization from the list.
Next, in the Personalization section of the Settings app click on Start from the left-hand list. Then toggle off the “Show most used apps” switch.
That’s all there is to it. Now the next time you launch the Start menu, there will no longer be a list of Most Used apps at the top of the menu.
It is also worth noting that you can permanently turn off the Most Used list from the Start menu as part of the Windows privacy options. To turn it off launch the Settings app and select Privacy from the list.
Next, under the General list turn off the “Let Windows track app launches to improve Start and search results” toggle switch. Then close out of Settings.
With that privacy option turned off, if you were to go to Personalization > Start – the “Show most used apps” option would already be turned off and it would also be grayed out. While you are at it there are other Start menu customizations you can do like remove recently added apps or check out any of the following articles:
Pin Favorite Websites to Start menuPin Playlists or Songs to Start menuPin Specific Settings to Start menuAdd Folder Locations to Start menuTurn Off Suggested Apps AdsMake the Start Menu More Space EfficientRemove Items from Most Used Apps ListFind Apps by First Letter the Easy Way