Add-ins are extensions that you can install to enhance Outlook’s functionality and unlock additional features, like CRM integration. But these add-ins can sometimes result in compatibility issues, especially if they’re not up-to-date or poorly coded. A conflicting add-in might cause Outlook to freeze, crash, or not open at all.

There could be many reasons for this issue, including corrupted Outlook data files, conflicts between add-ins, or outdated software. Let’s explore the most common reasons why Outlook isn’t opening and how to resolve this frustrating situation. Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors.

One reason Outlook fails to launch is that you’ve installed faulty add-ins in the app. These add-ins may be working incorrectly, causing the app not to launch. It's not uncommon, and you can easily make Microsoft's email and calendar app open with a few simple fixes. We’ll show you what to do on your Windows 11 or Windows 10 PC.

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.

Review your rules to identify any conflicts and resolve them by disabling or adjusting overlapping rules. We love reading your suggestions on new features and feedback about how you use our products! To learn more about how to ways to fix Outlook data file errors share your feedback, see How do I give feedback on Microsoft Office. Customers using the contact support buttons at the foot of the support pages, or the “email us” links in support Virtual Agent, are unable to open the Help Pane.

This happens because Outlook sometimes blocks unknown attachments to safeguard users’ data. Outlook not responding or not working is a common issue faced by Outlook users. This may occur due to outdated system drivers, virus or malware infection, lack of system resources, or system overheating. It may also occur if the Outlook data file is damaged or corrupted. The error 0x800CCC13 in Outlook ways to fix Outlook data file errors appears when trying to send an email. The error message indicates a connection issue but it can also occur due to other reasons, like incompatible add-ins, virus or malware intrusion, or bad sectors on the drive.

It repairs corrupt or damaged Outlook PST files and helps you access PST data. 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 ways to fix Outlook data file errors use the troubleshooting steps we're providing below to help resolve these startup issues. Since several different problems can cause Outlook not to open, you may have to try multiple fixes before your issue is resolved. Here, we list fixes for the possible causes, starting with the most likely culprit.

To learn more about how to share feedback, see How do I give feedback on Microsoft Office. There is currently no option to revert to the prior behavior, but we would love to hear your feedback to help us with future designs. To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. 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.

Right-click the folder, and then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions. To access the filtering options faster, add them to your Quick Access Toolbar.

An attachment can be a file, document, image, etc. that you include while composing an email message. Many Outlook users have complained of encountering ‘Unable to open Outlook attachments’ issue. This error may hamper your work and may create other issues as well.

The easiest way to find out if this is the problem is to temporarily disable your antivirus software and log in to Outlook as usual. If the prompts go away, you'll know ways to fix Outlook data file errors it was the antivirus software. Check your settings to see if you've got the “always prompt for password” feature enabled. It could be as simple as an out-of-date version of Outlook's software. Once an update has been run on your system, the bug may be rectified. You should be able to go to Outlook via a web browser and reset your password.

If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. 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. You might need to set Windows Update to automatically download and install recommended updates.

Edit this page