Repair Outlook Data Files pst and .ost

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As we sites.google.com have explained, 11 techniques to fix Outlook are having trouble starting, how about starting with essentials only. As manual approaches have no assurance and also possibility of data loss. So, we recommend you to opt Expert Recommended Approach as it is specially known for faster results and no risk of losing any data. If it is not solved by performing the given solutions then your OST files get corrupted. In this situation, we recommend you to opt BitRecover OST to PST Converter as this software can easily convert individual or batch OST files. It also helps to restore and convert damaged, corrupted, dismounted and oversize OST files without facing any limitations.

If you do not see the files in the default locations above, you can use Outlook to identify the file location. Your Outlook Data File might be corrupted because of incompatible add-ons running in Outlook. Along with that, it will be helpful to keep your folder structure safe.

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. Here is the next solution for your Microsoft Outlook keeps crashing on Windows. This step will show you how disabling the add-ins can help. The PST files will be repaired and the error will be resolved.

I hope this will work, please let me know if you still face the issue with Outlook. Large cache is often the cause of corruption, reduce the risks by reducing the size of the cache. If the troubleshooter can’t fix your issue, or if you’d like to fix it yourself, see the next section. If Startup Repair detects any of these issues, it will attempt to fix them automatically. If it cannot fix the problem, it will provide a detailed report of the issues it found.

If that doesn’t work, try sites.google.com using the Inbox Repair Tool or creating a new profile. And if nothing else helps, there are great tools out there that can recover everything for you. Take it one step at a time, and you’ll have Outlook working again soon.

We hope that you are now relieved and would like to hear from you if the article has helped you. Drop us a comment below if you have anything to say. If your Outlook is working fine now, it means add-ins are the culprit.

This issue has been fixed in the following versions and builds. Please reference Update History for builds by channel, Update history for Microsoft 365 Apps (listed by date). When you open or start a new email, classic Outlook crashes.

To manage your mailbox by reducing the size of the Outlook data file, see Reduce the size of Outlook Data Files (.pst and .ost). Clicking on the “Find” button to upload the corrupted Outlook PST files and click the “Repair” button to start the process. Add-Ins that improve user-experience may sometimes create problems due to incompatibility issues. In these instances, the best option is to update your Anti-virus software.

A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue. One of the first and most effective steps is to launch Outlook in Safe Mode. This mode turns off all add-ins and custom settings, helping you quickly identify if a third-party add-in is causing the startup problem. If you have reached here then we hope you got the solution as required to fix Outlook is having trouble starting.

Running the /resetnavpane command removes all customizations to the navigation pane. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will sites.google.com still work, but we recommend moving to Windows 11.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If these methods dose not work, you can also try a third party tool, Kernel for Outlook PST Repair tool. The navigation pane is the leftmost pane in Outlook where you’ll find your folder list and the icons to move between Mail, Calendar, People, and Tasks.

If you don’t choose an option on that dialog box, Outlook won’t let you do anything else. Pressing Alt+Tab will help you switch from window to window and help you see sites.google.com what dialog boxes might be stopping Outlook from responding. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech. If you can’t choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen. There are three steps you can take to try to get Outlook working again.

Exit Outlook, go to AppData, and manually delete cache folders. Newer Windows updates and builds like Windows 10/11 provide better compatibility sites.google.com with Outlook 2019 and Outlook 365. If your Outlook keeps freezing, despite all your effort, it’s time to bring in the professionals.

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