Outlook crashing opening calendar Collaboration

by Rena Amar on October 8, 2025

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Run the classic Outlook advanced diagnostic troubleshooter if you've tried all of the preceding steps and Outlook is still crashing or hanging. This step creates detailed information about your Outlook configuration and provides solutions for any known issues that are detected. It also gives you the option to upload your results to Microsoft so that a support engineer can review them. Some software or apps, such as antivirus or anti-malware, may conflict with Outlook 365, leading to crashes.

Is Microsoft having a problem with Outlook? <br><br>

In this case, you can temporarily disable the antivirus or the security app. If this fixes the issue, you can add Outlook and its related processes as an exception <a href="https://www.kjcampus.co.kr/bbs/board.php?bo_table=free&wr_id=129739">How to fix email not syncing</a> in the security app. Hopefully, now you understand why Outlook keeps crashing and how to fix it. We have mentioned all manual troubleshooting solutions that you can try one by one.

Method 8: Run Windows Store App Troubleshooter

Though there could be numerous reasons why Outlook crashes or crashes on your PC, you will go over a few problems in this article and show you how to fix each one. The free manual solutions to fix Microsoft Outlook keeps shutting down ends here. You can download the software on Windows Desktop or Laptop.

After rebuilding the OST file, it is crucial to check for any missing items in your mailbox. If you find any, you can recover them from the backup OST file using Stellar Converter for OST. This powerful OST to PST converter tool can extract all the data from the backup OST file.

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However, rebuilding the data file can resolve corruption issues.Once you find it, remove it from Outlook by selecting it and then clicking the "Remove" button.Most businesses and organizations rely on Outlook for daily communication and scheduling.Strangely enough, many users started facing the same issue after downloading the version 2504 update, which was released for Outlook for Microsoft 365 at the beginning of June.If it crashes after enabling an add-in, uninstall that add-in.It also gives you the option to upload your results to Microsoft so that a support engineer can review them.Therefore, to help you out with this issue, here is a comprehensive guide with some effective troubleshooting solutions.

The tool presents the extracted data in a preview window, where you can search for the missing items and save them in PST file. You can then import this PST file into your Outlook account using the Import and Export wizard to restore the missing items. This tool can efficiently convert large-sized orphaned or inaccessible OST files to PST and various other file formats. However, we came across many users who are still struggling with this Outlook issue. They still wonder ‘Why is Outlook constantly not responding? ’ So, it is possible that your PST file will get corrupted and you can lose all important data.

Create a new Outlook profile

If you receive a prompt indicating that the FORMS2 folder already exists, replace the old FORMS2 folder with the new one. Check if the problems causing ‘my Outlook keeps shutting down’ persist. If Outlook does not crash, this indicates that one or more Add-ins are to blame for the Outlook 365 crash. If this does not resolve the Outlook 365 crash issue, proceed to the next solution.

Steps to Fix Microsoft Outlook Crashes When Opening Due to PST Corruption

If you are experiencing the Outlook 365 keeps crashing or stops responding issue on Windows 10 and 11, you can follow the methods mentioned above to resolve the issue. If the OST file is inconsistent or damaged, you can recreate the file after taking its backup. If any items are missing from the newly created file, then you can restore the mail items from the backup OST file with the help of Stellar Converter for OST. It is a reliable OST to PST converter software that can extract mailbox items from orphaned or inaccessible OST files and save them in PST. Several Outlook users have reported experiencing an issue where Outlook 365 crashes, freezes, or stops responding when they try to open the application or send an email. This issue may occur due to various hardware or software-related issues.

However, if the problem persists, you can try the following solutions. The update was released on schedule and successfully resolved the problem. Shivam is a digital marketer and technical content writer at DRS Solution®, specializing in topics like databases, email recovery, and migration solutions. Running the latest version of Outlook ensures you have the most recent fixes and updates. An outdated version can also be a cause of why Outlook keeps crashing unexpectedly.

However, some might be incompatible with your Outlook version and thus, cause conflicts leading to crashes. Therefore, you can try disabling unnecessary add-ins to stabilize Outlook and its workflow. For that, we first need to find out which is the faulty add-in by running Outlook in Safe mode.

This step will show you how disabling the add-ins can help. Sometimes a program running in the system’s background interferes with Outlook, causing it to crash. Generally, many programs and applications run simultaneously or in the background which can cause interruptions. Therefore, first, restart your system, and second, check the internet connection. Follow the given ways along with their steps to fix the error and access your files.

Topics: fix office 365 password reset problems, microsoft 365 account recovery help, guide to fixing outlook issues

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