If none of the above method works, this means that the Outlook data file (PST) is corrupt or damaged. If it starts normally, it means that the Outlook profile was corrupt and resulted in the ‘Cannot start Outlook’ error. In such a case, you can restore the file by following these steps: profilename.xml. If the file size is 0 KB, this means it’s corrupt. Restore/Delete Navigation Pane Configuration FileĪ common reason behind “Microsoft Outlook won’t Open” error is corruption in Navigation Pane Configuration File i.e. If Outlook is still not opening, move on to the next method. Once the repair process is complete, try to launch and open Outlook. Follow the instructions on your screen to complete the MS Office repair process.From ‘Change your installation’ dialog box, select Repair and then hit Continue.When ‘How would you like to repair your Office programs’ window pops-up, choose Online Repair and then select Repair.

However, the steps will vary depending on whether you’ve Click-to-Run or MSI-based Office installation type.įor Click-to-Run installation type, do the following:

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