I have Windows 7 and MS Office 2010, Norton 360 & CCleaner only for virus & registry scans. CCleaner deleted MS Outlook. I doubt very much it was Norton and I seem to recall that it was after the CCleaner scan & fix that I couldn't open Outlook anymore. I managed to create another Outlook file but contacts are empty. I had informational dates, addresses, birth dates, phone numbers and a whole host of other information that I had got to get back if I can. How can I undo the general cleaner and registry cleaner to before this happened? I have all of the CCleaner registry cleaners backed up - I just don't know how to undo the processes.