1. Click 'Start' followed by 'All Programs' and find Microsoft Outlook in the list of available programs.
2. Right-click on Microsoft Outlook and then click 'Properties' from the context menu.

3. Click the 'Compatibility' tab in the 'Properties' dialog box.
4. Click the 'Run This Program as an Administrator' check-box. Click 'OK.' This completes the procedure for computers with a single user. If the computer has multiple users, you'll need to also click the 'Change Settings For All Users' option. This displays a further 'Properties' dialog box for Outlook. Again, click the 'Run This Program as an Administrator' check-box. Click 'OK' twice.