This error may hamper your work and may create other issues as well. This happens because Outlook sometimes blocks unknown attachments to safeguard users’ data. Microsoft Outlook is a great email client, and there is no doubt about it. And just like any other program, problems are bound to happen with the MS Outlook application. I have often seen Outlook users complaining about the abnormal behavior of Outlook. Some say that Outlook hangs on loading profiles, or Outlook keeps freezing.

If Outlook works fine now, you know one of those add-ins was the problem. Next, you can go back and turn them on one at a time. So, it will be helpful to find out which one caused the issue. In short, even small things can make Outlook stop working. But the good part is, you can fix most of these problems with simple steps.

The Family group calendar now appears in the Outlook.com groups area in the left nav on Outlook web and in the groups area of the Outlook mobile app. This fix will also lead to a reduction in the total number of contacts on your contact list. We will ensure that all information is retained and only contacts with matching information in all fields will be cleaned up. To check if you have received the fix, review your contact list to confirm duplicates have been removed.

Now, select from any of the given options, including Quick Repair and Online Repair. Outlook being a great platform, still encounters some glitches and errors like Outlook 365 not working on Windows 10. This error leads to less productivity, especially if Outlook 365 is your default email client. The only way to resolve this issue is to repair Outlook 365 in Windows 10.

If you have a large number of items in any single folder, you may experience performance issues during certain operations. For more information, see Outlook performance issues when there are too many items or folders in a cached mode .ost or .pst file. An out-of-date antivirus program may sometimes cause errors when you try to start Outlook as there may be compatibility issues between your antivirus program and Outlook.

An actual online repair will take a little longer, unpins office apps from the taskbar, and updates if there is an update available (which there is for these devices). This repair is happening quicker, is not unpinning and is not updating. I verified by manually doing an online repair on one device and it did everything it should have. If you’re experiencing any issues with Outlook on your Windows 10 system, there’s no need to Outlook not opening on Windows 10 panic. The first thing you should try is to fix the basic Outlook issues.

This issue occurs because Outlook cannot open the Forms Library. This issue can occur for Outlook on all Microsoft 365 Office channels. The emerging cases for this issue are on virtual desktop infrastructure (VDI). This is quite annoying and you’re certainly not alone. This should resolve the issue with Microsoft Outlook crashing.

We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. 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. The only thing is to know how to overcome them when they arise. Whether it's defective add-ins, frozen Outlook, faulty data files, and many others, you can manage all these problems yourself. Knowing the cause of the problem will help you sort out all the issues related to Outlook opening.

Moreover, this wizard offers an easy-to-understand and self-intuitive Graphical Interface. In conclusion, there is no need to get help from any experts or professionals. This alias will be added to their account as a secondary alias, with the original 3rd party alias will continue to be set up as the primary. Once this step is complete, the user will land in their Outlook inbox and be able to use all Outlook functionality with this new email address. The error message states that there are some issues with Outlook PST files. Outlook simply denies the existence of PST file because the file is corrupt and cannot be accessed anymore.

For more information, see Introduction to Outlook Data Files (.pst and .ost). You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook Outlook not opening on Windows 10 starts. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. If you are trapped in a similar situation that my Outlook is not opening, you may feel disturbed about the problem. In the following post, you will find out solutions for the common Outlook not opening problems bonus tips to prevent the problem from happening again.

This step creates detailed information about your Outlook configuration and provides solutions for any known issues that are detected. It also gives you the option to upload your results to Microsoft so that a support engineer can review them. To sum up, the blog elaborated on all the major reasons for Microsoft Outlook keeps crashing problem. Furthermore, we learned six manual solutions to fix this issue. So, for a worry-free and risk-free conversion, using the professional tool is the optimum choice.