Changed MS Outlook Settings with 2.28 and 2.29 in CCleaner Bug Reporting Posted April 10, 2010 It's been years since I worked on this problem but, if I recall correctly, Word and Outlook are connected because in Outlook you have Tools > Options > Mail Format > "Use Microsoft Office Word 2003 to edit e-mail messages" as an option. I'm not sure if this has to be enabled to connect the two apps but looking at a user who does, I see keys and values such as: HKCU\Software\Microsoft\Office\11.0\Word\Data|ToolbarsWordMail HKCU\Software\Microsoft\Office\11.0\Word\Options\OutlookEditor I also vaguely remember that HKCU\Software\Microsoft\Office\11.0\Word\Data|Settings appeared to be involved. Instead of using the CCleaner "Exclude" method, I used a modified winapp.ini file with RegKey10=HKCU deactivated. Since the winapp.ini doesn't seem to have changed any code for Office 2003, I don't know why the newer versions would behave differently. The only thing I can think of is that the newer versions have code related to the Office 2007 Compatibility add-in.