1. You haven't applied the most recent changes.
2. Another technique is using the outlook.
3. External material, such as images in an email message, is being loaded by Outlook.
4. Outlook is being hampered by a previously installed add-in.
5. Your mailboxes are excessively big.
6. The location of your AppData folder has been changed to a network location.
7. Your Office programs must be repaired
8. The data and user files in Outlook have been corrupted or damaged.
9. Your antivirus software is either obsolete or incompatible with Outlook.
10. Outlook is incompatible with other software.

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