If Outlook still gives you the “Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened.” error, you can attempt to manually remove the Navigation Pane configuration file and have Outlook reset it.
The next thing we wanted the answer to was, why can’t I open Microsoft Office Outlook?
If you still cannot open the Outlook window and the same “Cannot start Microsoft Office Outlook” error persists, try to restore the previous version of the PST file. Of course, in this case some of your recent emails and appointments will be lost, but it seems to be a better alternative than no Outlook at all.
If your old Outlook PST file was severely damaged and the repair procedure was not successful, you may get ” Cannot start Microsoft Outlook. The set of folders cannot be opened ” error again. If this case, the only way is to create a new profile and use it without importing data from the old .pst file.
How to fix “outlook cannot open the set of folders” error?
Cannot open the Outlook window. The set of folders cannot be opened.” error, you can attempt to manually remove the Navigation Pane configuration file and have Outlook reset it. Press the Windows + R keys on your keyboard to bring up the Run application. On older versions of Windows, you can also reach this from the Start menu.
Why is my XML file not opening in outlook?
Causes of Invalid XML Error : The actual reason due to which the “cannot start Microsoft Outlook Invalid XML” error can appear is the Navigation pane settings. If the XML files in the settings got damaged or corrupted due to any reason, you may get this problem.
Another popular inquiry is “How to fix outlook XML file corrupt error 0KB?”.
If the file is 0KB, then it is sure that the XML file for Outlook is corrupted. If you are facing this error, the Navigation Pane Settings for Outlook XML file may be corrupted and so try resetting it. Open the Windows Run box by pressing the Windows button and R key on the keyboard together.
Cause: The XML file which has Navigation pane settings is damaged / corrupted. This is the real reason behind the “ Cannot start Microsoft Outlook invalid XML ” error. The main symptom of this MS Outlook XML file corruption is very easily recognizable.