1 Classic Outlook not responding, stuck at "Processing," stopped working, or freezes
Josefina Kraegen edited this page 2026-01-19 14:25:17 +08:00
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Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface. Ensure that your Outlook recycle bin is empty and then run the Compact Now command to complete the mailbox housekeeping exercise. This, along with all other features, is conveniently available across all platforms for efficient inbox management on any device.

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. 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.

Keep track of appointments, meetings, or any other event from anywhere. Add, edit, or delete events using daily, weekly, or monthly views. For more information about working with calendars in Outlook.com, go to Using the calendar in Outlook.com. Get Help has troubleshooters you can run for many common scenarios. These often help resolve issues without the steps to fix Outlook not opening need to contact support.

For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We're investigating the issue and will update this page when a fix is available. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. This issue affects Outlook 2007, Outlook 2010, Outlook 2013, and Outlook 2016. After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface. Follow along with the video below to see how to install our site as a web app on your steps to fix Outlook not opening home screen.

Your Outlook profile holds all your account settings and data configurations. If this profile becomes corrupted, it might fail to load or cause Outlook to crash upon opening. Such corruption could result from improper shutdowns, software conflicts, or corrupted files within the profile. Youve probably already tried to start Outlook a few times, checked your internet connection, and restarted your device. But Microsofts email client still wont open, leaving you cut off from your important messages, schedule, and contacts. Microsoft regulatory releases new updates for Outlook and Windows (or macOS).

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 youd like to share any feedback about this article, please let us know.

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.

Outlook will detect this and asks if you want to start Outlook in Safe Mode. Select "Update Options" and then choose "Enable Updates". If prompted to allow Outlook to make changes to your computer, select Yes.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Try steps 1 through 3 in order until the issue is cleared. If you see a .pst file instead, skip this fix and check fix 6 below. 5) Wait for the program to detect the latest version of Outlook, and then follow the on-screen instructions to update your Outlook.

Most of these crashes come down to one thing problematic data files. PSTs and OSTs act like Outlooks memory banks. When they get too large, go corrupt, or are poorly configured, steps to fix Outlook not opening things start to break. This should resolve the issue of Outlook keeps crashing.

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.