Or read on here:
1. Open the Start menu.
Click the Start button in the lower left-hand corner of your screen.
2. Right-click any blank area or the title bar.
A good bet for a blank area is to try floating your cursor lower on the Start menu, close to the Start button. If you highlight an application while floating your cursor around, looking for a blank area, you can be sure that's not a blank area.
3. Choose Properties.
You can choose Properties from the resulting shortcut menu.
4. Click the Start Menu tab.
You can find the Start Menu tab in the Taskbar and Start Menu Properties dialog box that appears after you choose Properties. Likely, the Start Menu tab is already displayed.
5. Click the Customize button.
In the Customize Start Menu dialog box, display the Advanced tab.
6. Select the List My Most Recently Opened Documents check box.
The List My Most Recently Opened Documents check box may already be selected, so in this step, you're just making sure that it's selected.
7. Click OK twice.
The first time you click OK, you close the Customize Start Menu dialog box. The second time that you click OK, you close the Taskbar and Start Menu Properties dialog box.
8. Choose Start→My Recent Documents.