Pressing Alt+Tab will help you switch from window to window and help you see what dialog boxes might be stopping Outlook from why is Outlook not opening responding. These troubleshooting techniques apply to Outlook 2016 and 2011 for Mac. The navigation pane, which typically displays your Inbox, Sent Items, and other folders on the left sidebar, can sometimes become corrupted. A simple reset often resolves this and allows Outlook to open correctly. Sometimes, extra tools, ‘add-ins’ in Outlook, can make things tricky. They’re like helpful accessories, but sometimes they can cause trouble.

Sometimes, when Outlook isn’t working right, a simple restart can help. When you turn your computer off and on again, Outlook and your computer may solve many problems. As a result, it helps to clear out any issues or things that might be causing trouble, like when you clean up a messy room.

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. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors.

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.

If creating a new profile solves your issue, you can return to the Show Profiles dialog and delete your old profile. 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. Give Outlook a few minutes to finish the process and it should start to work again. If Outlook isn't stuck at a screen that says "Processing," or this didn't resolve your issue, continue to the steps below. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you.

You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. Not something you want to take on lightly, but sometimes you have to. Similar to our earlier suggestion of repairing Office (see #3 Repair Your Microsoft Office above), perform the same steps except choose to Uninstall. Be aware that you may need your product key if you received one.

Give Outlook a few minutes to finish the process and it should start to why is Outlook not opening work again. If Outlook isn't stuck at a screen that says "Processing," or this didn't resolve your issue, continue to the steps below. If those steps don't work, see Need additional help?

Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. When you're working with HubSpot Support to troubleshoot the desktop add-in, you may be asked to provide debug logs. When you have the extension installed in Outlook, it will store information in report logs on your computer. These logs are saved each day the extension is used, and your file names refer to the usage date. If your extension isn't functioning as expected, these logs help the support team take a deeper look into what's happening with the add-in on your computer.

You can automatically repair your Office program files to resolve such problems as Outlook freezing or not responding. To manage your mailbox by reducing the size of the Outlook data file, see why is Outlook not opening Reduce the size of Outlook Data Files (.pst and .ost). Your profile stores a variety of settings that control how Outlook looks and feels.

In this regard, we recommend Kernel for Outlook PST repair tool to save your precious time. When you reinstall Outlook, you are removing the current application from your system and then installing it again. Reinstalling your Outlook client can fix installation errors and common software failures. In case of Outlook crash, re-installing the application is the most recommended method to fix the issue. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems.

Starting Outlook in Safe Mode will prevent some or all add-ins from being loaded, prevents several settings files from being loaded and turns off the Reading Pane. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support. When reaching this point of the guide, the issue most likely also occurs for other users on the computer. This means that the issue is not caused by a configuration setting but by an why is Outlook not opening installation error.