Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.If your antivirus methods to stop Outlook crashing software includes integration with Outlook, you may experience performance issues in Outlook. In this case, you can disable all Outlook integration within the antivirus software. Or, you can disable any antivirus software add-ins that are installed in Outlook.

Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows and Office updates, click the link below. You may see one of the following errors in a pop-up message on your screen. If you are unable to connect or are prompted for your password repeatedly attempt the following options.

If you’re still having problems, try resetting your Windows Firewall settings back to how they were originally. Running the /resetnavpane command removes all customizations to the navigation pane. If the troubleshooter can't fix your issue, or if you'd like to fix it yourself, see the next section.

If you would like a deeper explanation or step-by-step instructions, scroll down to the section covering your issue methods to stop Outlook crashing for more details. 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. The classic Outlook consistently failed with CAA2000B or 4usqa, depending on the account state. However, when signing in using the new Outlook app, everything worked. Outlook sign-in failures started appearing in multiple tenants without any obvious cause.

For more information, please see Access to Microsoft 365 email and applications by audience. For information about Microsoft 365 storage quotas, please see Microsoft 365 storage quotas and information. The folder may have been deleted or the server where the folder is stored may be unavailable. You don't have appropriate permission to perform this operation. MAPI does not validate that a provider's DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine.

Check the status bar at the bottom of the screen to see if another process is running. If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. You might need to set Windows Update to automatically download and install recommended updates.

ScanPST mostly validates and corrects errors in the internal data structures of a .pst file. Therefore, structures such as BTrees and reference counts, are checked and repaired as necessary. These low-level objects have no knowledge of the upper-level structures, such as messages, calendar items, and so on, that are built upon them. If you cannot import the Newname.pst file into Outlook, unfortunately you have lost all the information methods to stop Outlook crashing that is not in the Lost and Found folder. After you run the Inbox Repair tool, you can start Outlook and recover repaired items. Optionally, you can try to recover additional repaired items from the backup personal folder.

In the meantime, please use the workarounds suggested for each issue. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app. This occurs because custom form script is now disabled by default. To determine the cause of the performance issues, start the Assistant, and run the Outlook Diagnostic in the Advanced Diagnostics section. Serious problems might occur if you modify the registry incorrectly.

After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running. In this case, sign in to the Microsoft 365 portal by using your administrator credentials, and then select service health to determine whether other customers are experiencing the same issue. If other customers are experiencing the issue, the issue should end when the service-interrupting event is resolved. If you’d like to share any feedback about this article, please let us know.

Wondering how to fix the Outlook Crashes During Startup error? Don’t worry, in this article we have explained 6 useful methods which will help you to fix this issue. Also, find out how you can repair your corrupted 0utlook data file using effective software like Remo Repair Outlook. If none of the above solutions help you resolve the Outlook crashing error, it means that your Outlook data file has been corrupted. This is caused when the program tries to access the storage file but fails to do so. However, frequent Outlook crashes also result in corruption making your Outlook inaccessible.