Cannot start Microsoft Outlook. Cannot open the window. The Set of folders cannot be opened. The operation failed.

If you are encountering the error message “Cannot start Microsoft Outlook. Cannot open the window. The Set of folders cannot be opened. The operation failed” while trying to open Microsoft Outlook, then you are not alone. This error message is quite common and can be caused by a variety of reasons such as corrupted files, damaged add-ins, or incorrect Outlook settings.

Here are some steps you can take to fix this issue:

1. Restart your computer: Sometimes, a simple restart can fix the problem. So, try restarting your computer and then open Outlook again.

2. Run Outlook in Safe Mode: Running Outlook in Safe Mode can help you identify and fix any issues caused by add-ins. To do this, press and hold the Ctrl key while clicking on the Outlook icon. When prompted, click on “Yes” to start Outlook in Safe Mode.

3. Repair your Outlook data files: If your Outlook data files are corrupted, then you may encounter this error message. To repair your data files, follow these steps:

– Open the Control Panel and click on “Mail”.
– Click on “Data Files” and select the data file that you want to repair.
– Click on “Settings” and then click on “Repair”.
– Follow the on-screen instructions to complete the repair process.

4. Create a new Outlook profile: If none of the above steps work, then you may need to create a new Outlook profile. To do this, follow these steps:

– Open the Control Panel and click on “Mail”.
– Click on “Show Profiles” and then click on “Add”.
– Follow the on-screen instructions to create a new profile.
– Once the new profile is created, select it and click on “Set as Default”.

In conclusion, the error message “Cannot start Microsoft Outlook. Cannot open the window. The Set of folders cannot be opened. The operation failed” can be frustrating, but it can be fixed. Try the above steps and see if they work for you. If you are still having issues, then you may need to contact Microsoft support for further assistance.

Conclusion

I hope the steps provided were helpful in resolving the issue with Microsoft Outlook. If you continue to experience problems, don’t hesitate to reach out to Microsoft support for further assistance. Good luck!

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