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You can also select multiple contacts—for example, Outlook not opening on Windows 10 to send an email to the selected contacts. Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. Availability has recovered, and engineers are investigating the root cause and identifying problematic servers. The team is sweeping all remaining capacity to identify and address residual issues. This library of articles provides guidance to troubleshoot and fix errors that you may experience when using Classic Outlook for Windows.  
  
Depending on the performance of your computer and the size of the .pst file being processed, the recovery process will take some time. After the data has been read, folders recovered from the corrupted .pst file and their contents will be available for viewing (the Folder List and the Items List respectively). The source file was not damaged I was converting my laptop from imap to pop email. Simply I wrongly backed-up my old e-mail history in a .ost file instead of a .pst file, and I needed to check some of the e-mails contained in that file.  
  
If you can't find a dialog box open, move on to the next step. A vast community of Microsoft Office365 users that are working together to support the product and others. To manage your mailbox by using the AutoArchive feature, see AutoArchive settings explained. We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature. If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem.  
  
If you don't choose an option on that dialog box, Outlook won't let you do anything else. Pressing Alt+Tab will help you switch from window to window and help you see Outlook not opening on Windows 10 what dialog boxes might be stopping Outlook from responding. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech. 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.  
  
Outlook users at times encounter issues and errors when working with the application. By understanding the common Outlook issues, users can swiftly troubleshoot and resolve most of these errors. If there is corruption in the Outlook data file (PST), the solution is to repair the file using the Inbox Repair Tool (ScanPST), which comes pre-installed with Outlook.  
  
If you are repairing a .pst file under Windows NT, 2000, XP, 2003, you will need rights to access system files and folders where Microsoft Outlook stores original .pst files. With a very high probability, Recovery Toolbox for Outlook can restore an array of data from .pst files to their original state before they were damaged. Last, you should replace the damaged file Outlook not opening on Windows 10 to a recovered one or merely add the recovered file to the list of data files in Outlook. The size of free space on the disk must be at least twice as much as the size of the .pst file you are repairing. The red color of the value in the Required free disk space field informs you that there is not enough space on the disk.  
  
A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue. One of the first and most effective steps is to launch Outlook in Safe Mode. This mode turns off all add-ins and custom settings, helping you quickly identify if a third-party add-in is causing the startup problem. If you have reached here then we hope you got the solution as required to fix Outlook is having trouble starting.  
  
Additionally, you can try the free trial tool to learn all about its functionalities and workings as well. Nevertheless, you cannot save the recovered data when using the demo tool. For that, purchase the premium version of the software. After the restart, try opening Outlook again to see if the Outlook keeps shutting down issue is resolved.  
  
Maybe you've added a new program to your computer that doesn't get along with Outlook, or your system has a virus. Regardless of the specific cause, there are several key troubleshooting fixes to try that might help. If you try to delete or move a large number of messages at once, Outlook can appear to freeze, but really, it's working behind the scenes. If Outlook is performing some operation on hundreds or thousands of messages at once, it might appear to be stuck.  
  
Therefore, to help you out with this issue, here is a comprehensive guide with some effective troubleshooting solutions. However, often these situations lead to PST file corruption. For that, we have suggested a reliable PST Recovery Tool.  
  
In case your Outlook PST is corrupt or damaged, you can always look for third-party Outlook PST Repair Tool to fix the issue. Inbox Repair Tool or ScanPST.exe is a free utility provided by Microsoft. However, for severely corrupted PST files, it’s recommended to use a third-party repair tool. In this regard, we recommend Kernel for Outlook PST repair tool to save your precious time. This kind of error usually Outlook not opening on Windows 10 indicates some issues on the disk where your Outlook PST file is located.