Windows 7 has a great new taskbar but not everyone is a fan of the jump lists. They keep track of what files you open and present links your recent files so you can jump to them. To protect your privacy or just clean up the taskbar you can disable the new jump lists.
Here is what the taskbar looks like with jump lists disabled:
Notice Internet Explorer no longer shows your browsing history.
To disable the jump lists right click on the Taskbar and select Properties.
Then, click on the Start Menu tab and uncheck Store and display recently opened items in the Start menu and the taskbar.
Click OK and you are finished.