I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window

For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We’re investigating the issue and will update this page when a fix is available. MAPI does not validate that a provider’s DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a network share when the OLE object is activated. If you’re using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue.

If you want to repair your corrupted PST file, opt for the Cigati PST Repair Tool. It will recover the corruption from your desired PST files. Outlook may remain stuck if other Office applications or processes are running in the background. I’m not certain to which post you’re referring, but everything that’s been mentioned so far can be done directly by the user. No elevated permissions are required to do any of these steps.

Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. To get support in Outlook.com, click here or select Help on the menu bar and enter your query. If the self-help doesn’t solve your problem, scroll down to Still need help?

If you have email messages in an email program, you must import your email messages and addresses to the new user profile before you delete the old profile. If everything is working correctly, you can now delete the old profile. To create a user profile, you must first create a user account.

Yes, you can often fix Outlook without reinstalling Office. A damaged or corrupted Outlook user profile is a common reason for “Outlook won’t open” errors. Creating a fresh profile can provide a clean slate for Outlook to start. Outlook stores all your email messages, meetings and events, contacts, and tasks in data files.

When you use a pst-file, it could be that an issue with that pst-file is preventing Outlook from starting correctly. When typing, please note the space between outlook.exe and /resetnavpane.If you encounter this issue more often, see this Quick Tip to find a more definitive solution. When typing, please note the space between outlook.exe and /safe.For alternative methods of starting Outlook in Safe Mode see this Quick Tip. As @ode2joy ​ said, clearing out the user’s profile usually works, which is a more thorough procedure than just deleting .nst and .ost files. I have found that when this happens its due to the Account in windows needing to be updated. If you close outlook(make sure its not in the system tray) then click on start and type Domain, then find Access work or school.

You should see the Microsoft account, click on it and disconnect it. To manage your mailbox by reducing the size of the Outlook data file, see Reduce the size of Outlook Data Files (.pst and .ost). Corrupt navigation panel settings can block Outlook from loading profiles. Resetting this component restores default navigation settings.

Add, edit, or delete events using daily, weekly, or monthly views. For more information about working with calendars in Outlook.com, go to Using the calendar in Outlook.com. Select More to see additional actions—for example, an option to print a message. If you want to learn about printing, see Print attachments received in email messages.

Kinda at a loss at this point, I am thinking about wiping the PC and starting again. When you start Windows normally, several applications and services start automatically and then run in the background. These applications and services can interfere with Outlook. A Selective Startup or “clean boot” process can help you identify problems that are caused by application conflicts. Dealing with https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide/ Outlook stuck on loading Profile can be frustrating, but there are various troubleshooting steps you can take to resolve the issue. Start with the simpler solutions and gradually move to more advanced ones if necessary.

Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows and Office updates, click the link below. Find solutions to common problems or get help from a support agent. On the Outlook status bar, if you see Disconnected, Working Offline, or Trying to connect…, then Outlook can’t reach the email server to send your mail. If you’ve changed your password on the website for your email account, you’ll need to change it in new Outlook, too. To get support in Outlook.com, click here or select Help on the menu bar and enter your query.

If you are having issues sending email, this might be due to validation issues with your Microsoft Account. We are aware that some users may not be able to receive email from Gmail accounts. If you access your Outlook.com account through the iOS Mail app, you may be repeatedly asked to enter your username and password.