Try these following actions when you cant open Outlook After Installing an update from Microsoft.
- Click on START - RUN (For Windows XP) or if you are using windows vista or windows 7 you can run command prompt by typing "CMD" In Start menu search and right click on command prompt and select run As Administrator.
- then type the following "Outlook.exe /resetnavpane"
NOTE: Pay close attention to syntax and spacing of command string
If the above method does not work try these.
- Reinstalled Outlook 2007
- Scan Your Full computer for Virus And Spyware.
- Use ScanPST.exe to address any potential problems stemming from .pst files
- Store primary .PST as .bak to see if Outlook 2007 would start and create new .PST folder.