When you open Outlook 2007 some cogs appear in the bottom right hand corner of the screen with a hint detailing “datafile check in progress”
This seems to display all the time.
FIX 1
Do a search for the SCANPST tool which repairs your outlook file
Run Scanpst.exe
select backup file first if errors are found
!!!!DO NOT USE OUTLOOK DURING THE REPAIR”
Look in C:/Program Files/Common Files/System/MSMAPI/1033/
or c:\Program Files\Microsoft Office\Office12
(2003 – The number 12 changes depending on which version of Outlook you have installed)
FIX 2
Apply all windows updates:-
1. Start Internet Explorer
2. Click Tools –> Windows Updates
If you cannot see tools tap the ALT key on your keyboard and the menu bar appears
3. Express
4. Review Updates
5. Install
FIX 3
There is also an Outlook 2007 hotfix which can be applied CLICK HERE