Add or remove Recent Items on the Start menu
Recent Items, which is located on the right side of the Start menu, displays a list of the files that you've used recently. You can open a file from this list by clicking it. Recent Items appears on the Start menu by default, but you can remove it, which will stop Windows from compiling a list of your recently opened files. If you want to begin compiling a list of your recently opened files again, you can add Recent Items back to the Start menu.
Open Taskbar and Start Menu Properties by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Taskbar and Start Menu.
Click the Start Menu tab, and then, under Privacy, select the Store and display a list of recently opened files check box so that it is checked. This will add Recent Items to the Start menu. To remove Recent Items from the Start menu, clear the Store and display a list of recently opened files check box.