Listed below are a few methods and solutions you can use to solve this Microsoft Outlook issue. In case these solutions do not work for you, you can use our repair tool to fix the problem and restore the items back to their original state. When a Microsoft Office app, like Outlook, stops working, use Office’s built-in repair tool to fix your app. Microsoft includes this tool with all Office steps to fix Outlook not opening installations, and you can use it to find and resolve problems with all your Office applications. Wait for the antivirus to scan your system, find any viruses, and remove those items. Since several different problems can cause Outlook not to open, you may have to try multiple fixes before your issue is resolved.

The AppData folder hosts a lot of files, including bookmarks and cached pages. This might be slowing down or overriding other commands in Outlook. To disable this feature, you'll need to edit the Windows Registry.

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. This command clears any broken settings related to the navigation pane and can frequently fix startup issues. Below, we’ll guide you through a series of solutions, from simple, quick fixes to more in-depth repairs, to help you get Outlook up and running again. If it starts without any problems, you can check steps to fix Outlook not opening the add-ins. Moreover, it will help you to get the answer to which add-in is causing the issue.

To sum up, we explored several methods to fix "Outlook won’t open" errors. Whether it’s a profile issue, a corrupted PST file, or faulty add-ins, the methods above can help you get Outlook running again. When Microsoft Outlook refuses to open, it’s incredibly frustrating. This issue often stems from common culprits like a corrupted user profile, a damaged data file (PST or OST), or even a minor conflict within its settings or add-ins.

Occasionally, that profile can become corrupted. You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook starts. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you. Hello, despite my new attempts with 80 users, I am resetting the registry keys for 3 to 4 users per day… Have you found a solution?

It is a powerful and almighty software that can be applied to fix corrupt Outlook steps to fix Outlook not opening PST files in any scenarios. I just have the hourglass that disappears after a minute. After multiple restarts the program will open one time, then reverts. There are other issues, too, that can contribute. 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.

As you can see the manual method seems to be very complicated and lengthy, so you can directly go with the third-party tool to solve the common Outlook errors. In the end, users should choose a method or procedure that they are totally comfortable to perform it. Usually, this type of error shows some issues, errors, or glitches on the local disk where your Microsoft Outlook PST files are located. You can effortlessly use some troubleshooting procedures to set up your local drive. We recently surveyed 287 of our users to ask, "What made you try Mailbird in the first place?".

Thankfully, Microsoft Outlook is fully optimized for Windows 10, meaning Compatibility mode is not necessary. You might be wondering what happens when you switch on steps to fix Outlook not opening the Compatibility mode for Outlook. When you do this, your Outlook might have opening problems. For this reason, you should always turn off Compatibility mode for Outlook.

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 cannot access the new app. I have restarted my laptop multiple times and tried to Uninstall the New Outlook but to no avail.

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.