You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10. If you can't open Outlook, or Outlook disappears or crashes, one of your add-ins may be to blame or you may need to update Outlook.

As we 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 Outlook not opening on Windows 10 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.

After installing the Outlook not opening on Windows 10 September Public Update, Outlook 2007 displays mixed languages in the user interface. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally.

When this registry key is set, Outlook will use its own built-in search engine. The built-in search will display the message below to indicate it is not using the Windows Search service. The issues documented in this section have been reported after installing the recent updates listed below.

Some users may not be able to empty their Deleted Items folder. We will update this article as soon as we have more information on a fix. Some Safari users are unable to add email addresses in the To section, or cannot point the cursor in the To field.

You can create a new profile and then add your email accounts to the new profile. If repairing your Microsoft 365 programs didn't resolve your issue, move on to the next step. For example, the first time you try to Dismiss All on a list of reminders, Outlook asks you if you're sure you want to do that. If you don't choose an option on that Outlook not opening on Windows 10 dialog box, Outlook won't let you do anything else.

We hope this guide proves useful in resolving your Outlook problems efficiently. 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. Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app. To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android.

You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start Outlook not opening on Windows 10 running. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365.

Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference. The AppData folder hosts a lot of files, including bookmarks and cached pages. This might be slowing down or overriding other commands in Outlook.

Due to the large number of affected users, the automated fix took time Outlook not opening on Windows 10 to apply. Microsoft advised using a manual workaround to restore access more quickly. A notification will be sent once the incident is fully resolved. We can diagnose and fix several common Outlook connectivity issues for you. If our automated tool can't fix your issue, or you'd like to fix it yourself, see the next section. Sometimes, antivirus real-time scanning can slow Outlook down.

Give Outlook a few minutes to finish the process and it should start to Outlook not opening on Windows 10 work again. If Outlook isn't stuck at a screen that says "Processing," or this didn't resolve your issue, continue to the steps below. If those steps don't work, see Need additional help?

Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, Outlook not opening on Windows 10 such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support. Get Help has troubleshooters for Microsoft 365 you can run for many common scenarios. If a troubleshooter is available for your issue, select Start to run that troubleshooter. Microsoft has its own tool for automatically scanning and correcting Office when things go awry. You can read about it and then run the Microsoft Support and Recovery Assistant to see if that helps.