I am having a similar problem, but the solution above has not worked for me. Since I upgraded from Win 7 to Win 10, ccleaner removes all my recent items. I have unchecked all boxes in Windows Explorer under the Windows tab, and unchecked Microsoft Office under the Applications tab. I am using the latest version of ccleaner. According to these settings, ccleaner should not clear recent items, but it does. Does anyone know what is happening?