Something strange happened and it uninstalled Office. I had to reinstall again. No change in behavior. I do get a different behavior when I try to open one of the new profiles. It still throws an error, but it's now: "Cannot start Microsoft Outlook. The properties button now works on each of the profiles, but you can't go any further than that. I created the first registry key and tested it. No apparent change. So I created the second one and did see a change.

Now it will create new profiles, but I still can't get into outlook. The error message is still the same "Cannot start Microsoft Outlook. You may well be on to something about the user who had a lot of accounts--as I do. I have at least six accounts. I'll keep working on it. I'm going to run scanpst on the files they claim are "not outlook data files" and see what happens. I know I keep saying this, but I really do appreciate the time you've taken on this.

I ran scanpst against all PST files in my folder. All had a few errors including the brand new ones that have never been opened , but nothing in the logs appeared to be serious. I attempted to repair them, but in every case, they had the same number of errors after the repair as before. I ran scanpst on all OL data files multiple times. By the end, with one exception, all ran cleanly or came back with only "minor errors".

The exception was my main email and biggest email account. That one got the message that I told you about earlier: " An unexpected error prevented access to this file. It comes back clean. When I go through control panel, the "Mail Setup" dialog box comes up as usual, but of the four buttons on that box, only two of them work.

Not the respective screens, no error message, nothing at all. I love outlook and have used it for years, but this is making me think about switching clients. I'm having the same issue in Outlook Standard Desktop version. All other Office apps open properly. I have MANY office email accounts on several different tenants.

I suspect Two Factor Authentication for my situation. Since Microsoft's inevitable answer is to create a new profile, I won't call them. With 2FA sign ins for each account, clearing browser data, etc. This is the second time in three months I have had issues. The last time it happened, I took the opportunity to do a fresh Windows install. Now, I'm thinking I need to find another mail app. I can't keep dealing with these issues.

Choose where you want to search below Search Search the Community. Search the community and support articles Outlook Outlook. Now, when I attempt to start it, I get several error messages: Your Outlook data file cannot be configured.

I have the same question 3. If your Outlook data file has become large-sized, then it can create problems with your Outlook. You can do that in different ways.

For instance, you can:. You can remove these files to fix the problem. Outlook allows the users to customize the navigation pane which is the leftmost pane in the main window. Sometimes, customizations in the navigation pane can prevent you from starting Outlook. You can reset the navigation pane to fix the problem. Certain events can corrupt or damage Outlook data files. These events include abrupt system shutdown, power failure, malware infection, etc. You can repair the file to resolve the error.

After locating the utility, run ScanPST. Then click the Start button to repair the file. Appreciate any advice that may be available to resolve the issue. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread.

I have the same question Report abuse. Details required :. Cancel Submit. Mark Picazo. However I did it slightly different: 1. Right click the Windows button, select Control Panel 2. Select Mail Microsoft Outlook bit 3.

6 Easy Ways to Solve Outlook not opening in Windows - Info | Remo Software.Outlook - "cannot start Microsoft Outlook. Cannot open the - Microsoft Community

Written By Abhinav Sethi. Approved By Kuljeet Singh. Microsoft Outlook is a powerful email client that offers many useful features for information management.

However, Outlook users occasionally run into problems with the application. This error prevents Outlook users from using the application. Sometimes, these add-ins interfere with Outlook. You can run Outlook in safe mode to confirm if the problem is caused by add-ins. Follow these steps:. You can disable the add-ins to fix the problem.

To do that, follow these steps:. If your Outlook data file has become large-sized, then it can create problems with your Outlook. You can do that in different ways. For instance, you can:.

You can remove these files to fix the problem. Outlook allows the users to customize the navigation pane which is the leftmost pane in the main window. Sometimes, customizations in the navigation pane can prevent you from starting Outlook.

You can reset the navigation pane to fix the problem. Certain events can corrupt or damage Outlook data files. Usually, the reason behind cannot start Microsoft Outlook error might be because of an outdated version of Outlook or a damaged Outlook data file.

Following are some of the reasons behind Outlook not opening:. Now let us see the solution to fix Microsoft Outlook not opening problem.

Note: If you are not able to open Outlook due to Outlook repeatedly asking password issue , you should refer this. This pane can be customized by users according to their needs and these customization can cause some serious error that will lead to Outlook not opening error. When you start Outlook in safe mode the add-ins are not loaded and hence it is easy to check if those add-ins are responsible for causing the Outlook not opening error. If Outlook launches with no problem then it is because of any add-ins responsible for cannot start Microsoft Outlook error.

You can manually enable one add-in at a time to see which add-in is causing the error. Your Outlook profile will have Outlook settings, there are chances of that profile getting corrupted. To verify whether your profile or not you have to create a new profile. If Outlook starts normally with the new profile, then you should consider repairing your Outlook data file.

Compatibility mode in Windows is used to help applications run in an older version of the Operating system. If you are running Microsoft Outlook in compatibility mode, try turning it off and see if it fixes the problem. This method is for Outlook and Outlook users only as the compatibility mode is not available for latest versions like Outlook or Follow the below mentioned steps to fix cannot start Microsoft Outlook error message by turning off Compatibility mode:. Now restart the Outlook application and see if you are still facing the error: cannot start Microsoft Outlook set folders cannot be opened, you will have to repair Outlook data file PST.

The penultimate solution to fix Microsoft Outlook not opening issue is to repair your Outlook data file. There is an inbuilt utility provided by Microsoft and its called inbox repair tool.

However, there are certain disadvantages with ScanPST. Hence it is not recommended to use ScanPST. If none of the above mentioned methods helped you in fixing cannot start Microsoft Outlook issue.

Designed to work in read only mode, the tool ensures security to the PST file by working on a copy of it and generates a healthy PST file. Download and Try the tool for free now. You can successfully solve cannot start Microsoft Outlook error using any of the above-mentioned methods. As a last measure, you can always implement a PST repair tool in case the other methods falter in giving you a resolution. Do let us know if you were successful in fixing the Cannot Start Microsoft Outlook error in the comments section below.

Molly is the Lead Technical Specialist with distinguished knowledge and understanding of Mac computers and operating systems. As a technical specialist she also believes in learning and spreading knowledge about the current and trending aspects of various media formats, Adobe Photoshop and macOS troubleshooting. A full-fledged learner, caffeine-lover and a firm-believer that technology would make the world a better place. I previously had this working but it stopped after some months.

Microsoft Outlook Won’t Open? 10 Ways to Fix

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