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  • Clair Gilliam
  • 4457133
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  • #1

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Created Oct 23, 2025 by Clair Gilliam@clairgilliam42Maintainer

Outlook: How to repair corrupted PST and OST files

The steps to access the repair tool vary depending on your operating system. If nothing works by now, you will have to consider adding a new Outlook account. While you shift all data content of the previous account to the new Outlook not opening on Windows 10 one, the process takes multiple steps. To understand more about the method, look across all stages of adding a new account on Outlook.

27% moved to Mailbird specifically because of bugs or support issues with their other email clients, 17% of which specifically called out Outlook. A Repair Account window will prompt you for your email address and password. Then it will run a program to diagnose the network connection problem. Updating your Outlook may conveniently solve the issues you're experiencing. All you need to do is to check and install any updates for the app.

We have mentioned all manual troubleshooting solutions that you can try one by one. However, before that, you must figure out the real cause of the issue. Later, go for the best solution that suits the cause of the Outlook issue. Additionally, if the issue causes PST file corruption, use the suggested software for better results.

Before proceeding to the steps below, consider backing up your Outlook data file. The Inbox Repair tool should also create backups before you begin the repair process. Whether you backed up the data file manually or with the Inbox Repair tool, we recommend remembering the backup location. In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder. Although the repair process might recreate some of the folders, they may be empty.

Corrupted or broken files in Microsoft Office or Microsoft 365 can cause serious performance issues. Use the repair your office option in Control Panel to get back on track. A virus or antivirus software issue can wreak havoc on your system, and Outlook won’t escape unscathed. Run a scan using reliable antivirus tools. Outlook constantly Not Responding if the Outlook data files contain errors.

Moreover, it may require a process of elimination. Further, we‘ll learn basic troubleshooting steps and gradually narrow down the possible culprits. If you can't find a dialog box open, move on to the next step. You must have at least three user accounts on the computer to complete these steps.

Make sure that the latest updates for Outlook are installed. For more information, see How to install the latest applicable updates for Microsoft Outlook (US English only). Many of these items can be automatically checked by the Classic Outlook Advanced Diagnostics troubleshooter.

In addition to that, it is usually easy to use, even if you’re not a tech-savvy person. Now you’ll have a fresh profile that should work properly if the old one was the problem. If Outlook works fine now, you know one of those add-ins was the problem. So, it will be helpful to find out which one caused the issue. You may not expect this behavior, but the removal of the item is appropriate given the circumstances.

To learn more about how to share feedback, see How do I give feedback on Microsoft Office. You don't have permission to create an entry in this folder. Right-click the folder, and then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions. Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email.

A laggy search is one of the most common Microsoft Outlook problems. It may arise at different times, depending on your platform or device. You can still log in to Outlook with a legacy @live.com email address. The first rule of Outlook troubleshooting is to eliminate the most obvious suspects. If you're committed to the task of Outlook troubleshooting in the meantime, let's get into our guide that will help you solve some of the most annoying Outlook issues. If you have Outlook in your startup folder, remove the shortcut from the startup folder.

Although the files are very robust, they can sometimes become corrupted and eventually stop working. All versions of Outlook from 2013 and above are configured to automatically receive updates from Microsoft. These updates ensure that the most recent security improvements are downloaded to fix bugs and apply Outlook not opening on Windows 10 patches. If the "Outlook Not Responding" issue did not cause you troubles in the past, it stands to reason to turn off the recently installed add-ins. I usually disable them one-by-one, closing Outlook with each change.

The new version of the object is written to a newly allocated space, but the old version remains in the OST file as well. To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application. The person who sent you the invitation will need to remove your permissions and then send a new invitation.

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