One of the Outlook 2013 updates Patch’s Tuesday release blanked the Navigation pane, here is the screenshot:
Uninstall the following updates
To uninstall the update in Windows:
- Search for Programs and features in Windows 8 or Control Panel Programs and features.
- Clock on “View Installed Updates” link on the left.
- Select Update for Microsoft Office 2013 (KB2817630) and click Uninstall at the top.
- Reboot the PC and everything will be fine.