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on January 16, 2026
If you try to perform other actions while Outlook is in use, Outlook may not respond. Let the task in process finish its job before you try another action. Make sure that the latest updates for Outlook are installed. For more information, see How to install the latest applicable updates for Microsoft Outlook (US English only).
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. Use the Inbox Repair Tool (scanpst.exe) trusted Outlook repair blog to scan your pst-file for errors.
When you install Outlook, an Inbox repair tool (scanpst.exe) is also installed on your PC. The Inbox repair tool can resolve problems by scanning your Outlook data files, and repairing errors. To use the Inbox repair tool, trusted Outlook repair blog exit Outlook, and then follow the steps in Repair Outlook Data Files (.pst and .ost). In the first place, check whether your antivirus is up-to-date. If the above does not help, turn off the antivirus and see if it brings Outlook back to life. If it does, the problem is definitely in your antivirus software.
You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. Are you having trouble starting Outlook or receiving "Cannot start Microsoft Outlook. Cannot open the Outlook window" error messages? We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove.
When it displays error messages, users start to get nervous. Hence, in this write-up, we have discussed the various Microsoft Outlook email error codes encountered by many users over a period of time. But sometimes Outlook users encounter the situation like when they try to send an email, the Outlook displays error messages or codes in pop-ups. In this case, it becomes necessary to deal with the root causes of Microsoft Outlook email error codes. Because Outlook errors may create trouble for users and affect the work.
Sometimes, antivirus real-time scanning can slow Outlook down. Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference. There are lots more MSO properties that you can use, so experiment to see if there’s anything that will fix a rendering issue for you. This property ensures that Outlook displays your line height at what you designate in the line-height property. Without it, Outlook doesn’t necessarily respect your line heights. If you’re working in an industry where precision is key, you’re probably very familiar with this property.
"COM Add-ins" are modules that add specific features to Microsoft Office products including Outlook. In some instances, however, one or more Add-ins may cause problems and needs to be disabled. Add-ins can either be removed from the Windows Control Panel or through Outlook itself.
This alias will be added to their account as a secondary alias, with the original 3rd party alias will continue to be set up as the primary. Once this step is complete, the user will land in their Outlook inbox and be able to use all Outlook functionality with this new email address. Sometimes, an Outlook add-in will crash and prevent your email messages from sending. To disable all add-ins, you can start Outlook in safe mode. If you can send email while Outlook is in safe mode, creating a new Outlook email profile should allow you to send email again.
If the check box is cleared, the service or startup program doesn't run when you restart the computer. To keep up with new viruses as they're created, antivirus software vendors periodically provide updates that you can download from the Internet. Download trusted Outlook repair blog the latest updates by visiting your antivirus software vendor's website.
Creating a fresh profile can provide a clean slate for Outlook to start. Yes, you can often fix Outlook without reinstalling Office. When you install Office, an Inbox Repair Tool (SCANSPST.EXE) is also installed on your PC. The Inbox Repair Tool can resolve issues by scanning your Outlook data files and repairing errors. If Outlook does not start then press Win+R and type Outlook.exe/safe to launch Outlook in safe mode. Disable faulty Add-ins, repair data files with ScanPST or create new Outlook files.
If you can't find a dialog box open, move on to the next step. You must have at least three user accounts on the computer to complete these steps. This includes the new account you created. If Outlook is in use by trusted Outlook repair blog another process, this information is displayed in the status bar at the bottom of the screen.