Fix “Cannot Start Microsoft Outlook” Error Without Losing Any Data

admin | November 27th, 2017 | Windows Outlook

Fix "Cannot Start Microsoft Outlook" Error Without Losing Any Data?

"Cannot open the Outlook window. The set of folders cannot be opened."
"Cannot start Microsoft Outlook. Cannot open the Outlook window."
"Cannot start Outlook. The set of folders cannot be opened."
"Cannot start MS Outlook. Your profile is not configured."

Are you getting any of the above error while using Outlook account? Frustrated of searching solutions for any of these errors? Not only you, in fact, there are many Microsoft users facing some or the other error while starting Outlook. In this blog, we have come up with the best and easy workarounds to fix these Outlook errors like mentioned above. Before going to the solutions, let’s take a brief intro.
Microsoft Outlook is the topmost email application used by the business and individual users. It is an email client manager through which a user can easily manage their all emails, contacts, calendars, meetings, tasks, etc. Moreover, it saves all data items in a separate file generally called as PST or Personal Storage Table file. However, if any corruption issue encountered in the Outlook.pst file, then all data will become inaccessible. Thus, when a user tries to access Outlook data, then it starts displaying errors. One such type of error is:
" Cannot start Microsoft Outlook. Unable to open Outlook window"

Therefore, it is really important for the users to fix " Cannot start Microsoft Outlook" as soon as possible. Otherwise, a user might lose access to its important data permanently.

Why "Unable to start Microsoft Outlook" Error Occur?

There can be various possible reasons behind this Outlook error but the major ones are listed below:

  • Navigation Pane files settings become corrupted.
  • Run the Microsoft Outlook application in the compatibility mode.
  • If a user is using the Outlook profile of older version, then also this error may encounter.
  • A user has accidentally deleted the Outlook PST files or it becomes corrupted.

If a user is running the application in compatibility mode or the data files gets deleted or corrupted because of inappropriate uninstallation or reinstallation or due to older version of Outlook profile, then "Cannot Start Microsoft Outlook" error is displayed on the screen It does not matter what is the main reason but it does not allow a user to open the Outlook window.

Most users face the problem of corruption in Outlook data files as a result of which users cannot access Outlook. Corruption in PST files can cause various problems that can cause performance issues. In this case, it is recommended to use a third party tool which can help to remove even serious damage from PST files. You can download a trial version of this tool for free to try the Windows operating system.

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Common Asked User Queries

"I am using Microsoft Outlook from past 2 years but never find any difficulty while using it. However, yesterday when I was trying to start the application it displays an error stated Can not start MS Outlook. Cannot open the Outlook window. I was so shocked and did not understand what is wrong with it. I looked for some manual tricks but did not receive any satisfactory result. Can you please tell me what is the best-suited solution to resolve this error in an efficient manner?"

" I recently started a new business and for which I have created an account in Microsoft Outlook because of its popularity. It was working properly, but 2 days ago I received an error Unable to start Microsoft Outlook while staring it. I tried many times to open Outlook application but did not fix the issue. I am worried as I have some official emails along with attachments having legal documents in it. I cannot afford to lose all of them and I have searched a lot to fix this issue but did not get a relevant solution. If anyone out there knows any solution to fix this error, please guide. I will be grateful to you."

Different Manual Tricks to Resolve "Cannot Start Microsoft Outlook" Error

After understanding the exact reason behind the occurrence of this error, a user needs to fix this error. Now, to do so one needs to follow the steps mentioned below:


A small problem in Microsoft Outlook can create a big trouble for the Outlook user. Moreover, it affects the normal functioning of Outlook also. Thus, it is really important for the users to solve fix it as soon as possible. Therefore, in this post, we have discussed different manual tricks to troubleshoot " Cannot start Microsoft Outlook" error. A user can try all of them and fix all common errors of Outlook in an efficient way.