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on November 9, 2025
For more information, see Introduction to Outlook Data Files (.pst and .ost). You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook troubleshooting Outlook startup issues starts. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. 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. If you are trapped in a similar situation that my Outlook is not opening, you may feel disturbed about the problem. In the following post, you will find out solutions for the common Outlook not opening problems bonus tips to prevent the problem from happening again.
Conflicting rules can prevent certain rules from working troubleshooting Outlook startup issues as intended. Review your rules to identify any conflicts and resolve them by disabling or adjusting overlapping rules. Look for anti-spam software that also flags websites you visit, enabling you to scan for and prevent online viruses.
Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.If your antivirus software includes integration with Outlook, you may experience performance issues in Outlook. In this case, you can disable all Outlook integration within the antivirus software. Or, you can disable any antivirus software add-ins that are installed in Outlook.
Then, one day you realize getting rid of that file was a huge mistake. Let's eliminate any feelings of despair regarding a deleted file. If you cannot restore the file from your computer's recycling bin, here's what to do. Gmail has a positive reputation when it comes to spam filtering.
We can practically feel your frustration through the screen. There's about a dozen things on your to-do list, yet most of them you can't get to because your Outlook email is troubleshooting Outlook startup issues giving you trouble. If you are having problems with Outlook, there are a few things we can help with to get you back to sending and receiving your email.
Over time several add-ins would have been installed into your Outlook user profile. Each of these add-ins needs to be loaded into memory before starting Outlook. Add-ins that are no longer used still load, contributing to the slower startup of Outlook. Disabling the non-essential add-ins should see an improvement in start times as well as stability. Corrupted files may not only impact performance but also trigger errors such as 0x f, which typically means Outlook can’t access its data file or address book. Creating a new profile or repairing the data file often helps resolve it.
Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. We're investigating the issue and will update this page when a fix is available.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Occasionally, I’ll run into an issue with Outlook that can be addressed by running a repair. Being a Chief Technical Analyst, I am aware of the technicalities faced by the user while working with multiple technologies. So, through my blogs and articles, I love to help all the users who face various challenges while dealing with troubleshooting Outlook startup issues technology. Sometimes, these antivirus or security apps might block or restrict the outgoing connectivity.
There is a better alternative to windows live mail that is used widely all over the world. Then you are dealing with one of the many other Outlook issues. Here is a preview of common problems and what solutions we offer. If you would like a deeper explanation or step-by-step instructions, scroll down to the section covering your issue for more details. If you're committed to the task of Outlook troubleshooting in the meantime, let's get into our guide that will help you solve some of the most annoying Outlook issues.
How to Close Unresponsive Outlook on WindowsOpen Task Manager: Right-click on the taskbar and select "Task Manager" or use the Ctrl+Shift+Esc shortcut.Locate Outlook Process: In the Processes tab, find the "Outlook" process.End the Task: Right-click on the "Outlook" process and select "End Task."More items...
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 troubleshooting Outlook startup issues installation error.