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on December 28, 2025
Are you having trouble starting Outlook or receiving "Cannot start Microsoft Outlook. Cannot open the Outlook window" error messages? We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. Your Outlook profile holds all your account settings and data configurations.
If you want to fix PST files using this tool, make sure to have a proper backup of the Outlook PST before processing. To resolve this issue, delete your .ost file and that you let Outlook redownload the information from the server that is running Microsoft Exchange Server. The first step is to check whether the PST file exists in its original location.
While carrying out the above methods it is advisable to close Outlook beforehand. Rohan Wiese is a Technical Content Writer at Aryson Technologies, specializing in databases, e-mail recovery, and e-mail migration solutions. Now you’ll have a fresh profile that should work properly if the old one was the problem. But little tools that add extra features to repair Outlook data file Outlook can be the reasons for Outlook corruption.
We have multiple tools to help you automatically diagnose an issue, troubleshoot, and fix problems with Outlook. Contact someone directly by selecting Start chat or Send email. For contacts, you can select Filter in the upper right to repair Outlook data file select what to display in the list and how to sort.
Each user can have particular reasons for corrupting their PST files. But, in some cases, a few common reasons are usually present behind Outlook data file corruption. You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file. After you've moved all the items, you can repair Outlook data file remove the Recovered Personal Folders (.pst) file, including the Lost and Found folder.
This goes to prove that the problem came from your original Outlook profile. With great functionality, you can manage your email, contacts, calendar as you like. Try these troubleshooting steps in the order presented here, from simple to more complicated. However, if you encountered other issues like Outlook not responding, learn how to fix Outlook not responding repair Outlook data file here. Check the solutions to fix "Outlook not opening" problem and how to avoid "Outlook won't open" again.
Add-ins are extensions that you can install to enhance Outlook’s functionality and unlock additional features, like CRM integration. But these add-ins can sometimes result in compatibility issues, especially if they’re not up-to-date or poorly coded. A conflicting add-in might cause Outlook to freeze, crash, or not open at all.
Safe Mode loads Outlook with only essential components, allowing you to isolate and disable faulty add-ins. repair Outlook data file We have tried all things mentioned above (except reconnecting the MS account), but the only solution so far is deleting the users profile. As @ode2joy ​ said, clearing out the user’s profile usually works, which is a more thorough procedure than just deleting .nst and .ost files. You can automatically repair your Office program files to resolve such problems as Outlook freezing or not responding.
This utility is not the professionals’ recommendation, as it comes with a lot of drawbacks. Before implementing this method to fix Outlook PST files, read its limitations for more insight. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. I ran a full online repair on Office 365 PC where it uninstalls office, downloads the latest version and reinstalls, Windows is fully updated. If your PST file is stored on a network drive, ensure that the drive is accessible and that you have the necessary permissions.
Besides that, its free edition can process up to 50 items from each folder, making it easy for users to understand tool’s working. In earlier versions of Outlook, repair Outlook data file we previously recommended that you use the Scanost.exe tool for errors that occur with your offline Outlook Data File (.ost). The Scanost.exe tool is no longer available starting in Outlook 2010. We now recommend that you delete your offline Outlook Data File (.ost) and that you let Outlook redownload the information from the server that is running Exchange Server. Once your task is done of locating the ScanPST.exe tool, kindly head to follow the below-given steps to fix Outlook data files (PST).
The Lost and Found folder contains any folders and items recovered by the repair tool that Outlook can't place in their original structure. In this guide, we’ll explore common Outlook issues and provide step-by-step solutions to fix them. Here are some of the reliable methods to restore Outlook 365 not working issue. Follow these methods step-by-step to overcome the issue. Opening Outlook in safe mode means that the application will only open all the necessary files to start the applications.
We will be delving into exploring the powerful methods to fix Outlook PST files in the following paragraph. If you can open the original Outlook Data File, you might be able to recover additional items. The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder. There may be items in the backup file that you might be able to recover that the Inbox Repair tool couldn't.