Start classic Outlook in safe modeIn Windows 10, click Start.Type Outlook /safe, in the Search programs and files and then click OK.Close and re-open Outlook.If the issue is resolved, you can keep working, or if you have time, take the following steps to find out what COM Add-in is causing the problem.

If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem. Restore the add-ins one at a time until the problem does occur to determine which add-in is causing the problem. Make sure that the latest updates for Outlook are installed. For more information, see How to install the latest applicable updates solutions for Outlook loading issues for Microsoft Outlook (US English only). Many of these items can be automatically checked by the Classic Outlook Advanced Diagnostics troubleshooter.

Uninstalling this part of your virus scanner is strongly advised; you’d still be sufficiently protected by your on-access scanner part of the virus scanner. If you get the error "Cannot open the Outlook window" when trying to start Outlook, the error usually indicates that your Folder Pane or Navigation Pane settings holds a corruption. This guide explains all you need to know about that in order to get your Outlook to start without errors again.

Occasionally, classic Outlook tries to run a process in the background. Auto-archive, sending and receiving a very large attachment, or running some of the other mailbox tools can all be done in the background. Check the status bar at the bottom of the screen to see if another process is running. If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. 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.

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 solutions for Outlook loading issues installation error.

Although the files are very robust, they can sometimes become corrupted and eventually stop working. All versions of Outlook from 2013 and above are configured to automatically receive updates from Microsoft. These updates ensure that the most recent security improvements are downloaded to fix bugs and apply solutions for Outlook loading issues patches. If the "Outlook Not Responding" issue did not cause you troubles in the past, it stands to reason to turn off the recently installed add-ins. I usually disable them one-by-one, closing Outlook with each change.

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 solutions for Outlook loading issues 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.

The good news is that most "Outlook won’t open" errors can be resolved with a few proven troubleshooting steps. If the above solutions for Outlook loading issues steps, especially ScanPST.exe, fail to resolve the "Outlook won’t open" error, your Outlook data file is likely severely corrupted or extensively damaged. In such critical situations, a specialized and reliable professional tool like the Aryson Outlook PST Repair Tool becomes the best solution. Yes, you can often fix Outlook without reinstalling Office.

Sometimes outdated or over-protective anti-virus / anti-spam programs can conflict with Outlook or with one of your Outlook add-ins. As a result, the anti-virus blocks the add-in and prevents Outlook from functioning properly. A corrupted new profile or Outlook profile can lead to delays, crashing, or the Outlook not responding error. All users know that Microsoft Outlook is a powerful email program, but it can sometimes act up and become unresponsive. We’ve got you covered with these easy-to-understand solutions to get your Outlook back on track.

I have been using the New Outlook app for a few months now, no issues. I am able to open the older Outlook app, but solutions for Outlook loading issues cannot access the new app. I have restarted my laptop multiple times and tried to Uninstall the New Outlook but to no avail. So, there are several factors that cause the Outlook web access issue.