If you are looking for a solution to fix Outlook Attachment Not Opening on Double Click issue, then here, you will get some tried and tested methods :
- Clear Temporary Files – Outlook stores attachments in a temporary folder that may get corrupted. Deleting these files often resolves the issue.
- Check File Associations – Ensure that the correct program (e.g., Word for DOCX, Adobe Reader for PDF, Excel for XLSX) is set as the default app to open attachments.
- Disable Problematic Add-ins – Go to Outlook options and disable unnecessary add-ins that might interfere with opening attachments.
- Update Outlook and Windows – Install the latest patches and updates to fix compatibility issues.
- Review Security and Antivirus Settings – Adjust Outlook’s Trust Center settings or temporarily disable antivirus if it is blocking attachments.
- Repair Office Installation – Use the Microsoft Office repair option to fix any internal application errors.
If none of these methods work and the issue is due to a corrupted PST file , the best alternate solution is to use Advik PST Repair Tool . This software repairs damaged PST files and restores all mailbox data, including emails and attachments, ensuring you regain complete access without data loss.