As @ode2joy ​ said, clearing out the user’s profile usually works, which is a more thorough procedure than just deleting .nst and .ost files. When something goes wrong with Outlook, Microsoft steps to fix Outlook not opening recommends that we start it in Safe mode. Simply that Outlook will be loaded without your add-ins and customization files. Originally, the freezing would only occur when I actually tried to do something. So, if I tried to open a message, search my inbox, write a new email, go to the calendar, etc., it would freeze up for about 5-10 seconds at a time. The freezing never seemed to occur when I had Outlook open but was not using it.

I usually disable them one-by-one, closing Outlook with each change. This helps to pin down the culprit that causes Outlook to freeze. A conflict with steps to fix Outlook not opening Outlook may occur with applications like desktop search, PDF software, or other Microsoft 365 tools that interact with your email account.

I usually disable them one-by-one, closing Outlook with each change. This helps to pin down the culprit that causes Outlook to freeze. The first thing we need to do is kill all hanging Outlook processes.

The first step is to check whether the PST file exists in its original location. You can also download the trial tool to try and test the working of the tool before buying the premium edition. If your PST file is stored on a network drive, ensure that the drive is accessible and that you have the necessary permissions. Reconnect to the network or contact your system administrator for assistance.

It enables you to verify its performance and functionality and ensures your critical data can be recovered without hassle. Before making changes, make sure to save your Outlook stuff to steps to fix Outlook not opening keep it safe. If Outlook still doesn’t open after trying these fixes, you might need more help. Asking IT experts or Microsoft’s support team could give you the best solution for the Outlook problem you’re facing. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally.

If your internet connection is not stable, then there could be a chance that Outlook freezes when sending email. If it does and Outlook starts working properly, then most likely the problem is with one of your add-ins, which leads us to the next step. The first thing we need to do is kill all hanging Outlook processes. To do this, start up the Windows Task Manager either by pressing Ctrl + Alt + Del, or by right clicking the taskbar and choosing "Start Task Manager".

I am not quite sure when this started, otherwise I would have rolled back updates and/or removed recently installed apps. I recently uninstalled and reinstalled Office but it only made the issue worse. In System Configuration, if you select a check box, the related service or startup program runs when you restart the computer. If the check box is cleared, the service or startup program doesn't run when you restart the computer.

For more information, see Outlook performance issues when there are too many items or folders in a cached mode .ost or .pst file. When you install Office, an Inbox Repair Tool (SCANSPST.EXE) is also installed on your PC. The Inbox Repair Tool can resolve issues by scanning your Outlook data files and repairing errors. Resolving Outlook’s "Loading Profile" hang involves a mix of system checks, process management, and profile or data file repair. Applying these targeted steps gets Outlook running smoothly and restores access to your mailbox.

Select Change, then choose Repair and click the Continue button. So for about the past month, my Outlook constantly freezes, the window grays out, and I get a "not responding" error message. I am not quite sure when this started, otherwise I would have rolled back updates and/or removed recently installed apps.

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 steps to fix Outlook not opening dialog box, Outlook won't let you do anything else.

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. If the troubleshooter can't fix your issue, or if you'd like to fix it yourself, see the next section.

Also, we go over the stepwise working procedure of both solutions and the reasons behind PST file corruption issues. The Inbox Repair tool or ScanPST.exe is not a convenient way because of multiple restrictions. Moreover, this tool can quickly recover email messages, calendars, tasks and other data from corrupted PST files.

If your computer is running low on resources, Outlook will freeze up. If your antivirus software isn't up-to-date, Outlook may not function correctly. If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem.