There are three steps you can take to try to get Outlook working again. When you are unable to log into the add-in, or the add-in does not load correctly, uninstall then reinstall the add-in. We have multiple tools to help you automatically diagnose an issue, troubleshoot, and fix problems with Outlook. If you are having problems with Outlook, there are a few things we can help with to get you back to sending and receiving your email.

Start Outlook in safe mode to fix "Processing" screenIn Windows 10, choose Start, type Outlook.exe /safe, and press Enter.In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.

Outlook users at times encounter issues and errors when working with the application. By understanding the common Outlook issues, users can swiftly troubleshoot and resolve most of these errors. If there is corruption in the Outlook data file (PST), repair Outlook data file the solution is to repair the file using the Inbox Repair Tool (ScanPST), which comes pre-installed with Outlook. However, if the tool freezes or fails to repair the PST file, the best solution is to use Stellar Repair for Outlook.

This reliable Outlook PST repair tool can repair large PST files efficiently and repair Outlook data file quickly, regardless of the severity of corruption. It allows to save the mailbox data from the repaired PST to a new PST file and various other file formats, including MSG, EML, RTF, HTML, and PDF. The error message states that there are some issues with Outlook PST files. This error tends to pop-out when you attempt to launch Outlook. Outlook simply denies the existence of PST file because the file is corrupt and cannot be accessed anymore. Another reason can be Outlook is set to read-only mode, which stops Outlook from accessing the PST file.

Repeat the process for all the add-ins that were selected earlier and wait until the Outlook crashing problem repeats. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost). The steps to access the repair tool vary depending on your operating system.

The funny thing is that repair Outlook data file the new "modern" Outlook worked fine, though, which made things even more confusing. We looked at the sign-in logs, tested new accounts, and eventually found what was really going on. Microsoft Outlook is one of the most widely used email clients globally, especially in professional and business environments. Outlook also comes with strong built-in security features, making it a reliable choice for managing communication and workflow.

To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. To access the filtering options faster, add them to your Quick Access Toolbar. Another options is to use the Filter Email button on the ribbon.

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.

The error message states that there are some issues with Outlook PST files. This error tends to pop-out when you attempt to launch Outlook. The main reason, however, is the corruption in the PST file. Outlook simply denies the existence of PST file because the file is corrupt and repair Outlook data file cannot be accessed anymore.

You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. 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. If your Outlook is working fine now, it means add-ins are the culprit. But it is important to identify the specific add-in that was causing trouble. To identify that, check the add-ins one at a time and restart Outlook.

We have gone through many steps with Microsoft Support until they could help no further. We have tried to trouble shoot and done a system restore but there was no restore point repair Outlook data file and a startup repair and nothing worked. When we performed a startup repair this is the message we received. Outlook stores all your email messages, meetings and events, contacts, and tasks in data files.

One of the failed sign-in windows showed a long string under a field labeled Microsoft Information Protection API. Running that value through the Entra admin portal revealed what we needed. At that point, the focus shifted to what was happening during authentication. The answer came from a closer look at the Microsoft Entra sign-in logs and a hidden dependency that I wasn’t aware of.