How can I delete the "task bar and" Start "Menu Properties" in the "custom" in the "past projects" content?

If the cleaning bar - Hide inactive icons - Customize - previous projects? 1 . Run " Regedit " to open the Registry Editor and expand the following subkey HKEY_CURRENT_USER Software Microsoft Windows CurrentVersion Explorer TrayNotify find " lconStreams " and " PastlconsStream " The two key elements, and its value to Remove, and then exit the Registry Editor. 2 . Press " Ctrl + Alt + Del " key combination to open the Task Manager, and the "process" tab , find the " explorer.exe " process , click "End Process" to stop them, found the bar task disappear. 3 . In the Task Manager tab "File" first click " New Task button ," type " explorer.exe" , enter the taskbar after another appeared . 4 . Restart the computer in the " Customize Notifications " dialog, it is " past projects " list, has no record of it!