A client of mine was having the error 0x8004010F in Outlook 2010. I repaired the PST and it fixed 30 or so errors but I was still having the issue. I ended up creating a new Outlook profile using the following link…
http://support.microsoft.com/kb/2289904
After creating the new profile I could not open or export the previous PST. I realized she had checked the option Run this program in compatibility mode for: Windows XP checked. Once I unchecked that Outlook 2010 could open & export the previous PST.