Windows Vista by default saves and displays all your recently opened files and programs on your start menu. The purpose of this is to make it easier for users to find a certain file or program. However, for privacy purposes especially when they share their computer to other people many users would prefer all those information to remain hidden. Follow this quick and easy steps if you want to turn it off.
1. Right click on your Taskbar then click properties.
2. Click on the Start Menu tab
3. Uncheck “Store and display a list of recently opened files” and “Store and display of recently opened programs“
4. Click OK