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. Let’s start with the solutions to fix these common Outlook errors. If Outlook works in Outlook Safe Mode but resetting your dat-files did not help, then the issue is most likely caused by an add-in. When typing, please note the space between outlook.exe and /resetnavpane.If you encounter this issue more often, see this Quick Tip to find a more definitive solution.
None of the events or information was lost in the move to the new calendar. The Family group calendar now appears in the Outlook.com groups area in the left nav on Outlook web and in the groups area of the Outlook mobile app. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com. Your browsers can automatically disable some of Outlook web features which can lead to this issue. When you log in to your Outlook web account, but couldn’t do so. For this, go to the Microsoft service status page and look for Outlook.com and see if the icon is red or yellow.
When you use a pst-file, it could be that an issue with that pst-file is preventing Outlook from starting correctly. When typing, please note the space between outlook.exe and /resetnavpane.If you encounter this issue more often, see this Quick Tip to find a more definitive solution. When typing, please note the space between outlook.exe and /safe.For alternative methods of starting Outlook in Safe Mode see this Quick Tip. As @ode2joy said, clearing out the user’s profile usually works, which is a more thorough procedure than just deleting .nst and .ost files. I have found that when this happens its due to the Account in windows needing to be updated. If you close outlook(make sure its not in the system tray) then click on start and type Domain, then find Access work or school.
It repairs corrupt or damaged Outlook PST files and helps you access PST data. 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 https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// use the troubleshooting steps we're providing below to help resolve these startup issues. Since several different problems can cause Outlook not to open, you may have to try multiple fixes before your issue is resolved. Here, we list fixes for the possible causes, starting with the most likely culprit.
If you are having trouble locating scanpst.exe you can also use OutlookTools (free!). For a step-by-step guide on how to https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// work with scanpst.exe see Using the Inbox Repair Tool (scanpst.exe). For more detailed instruction on how to enable or disable add-ins see this Quick Tip.If you you get an error that you cannot disable the add-in see this Quick Tip instead. If you share this computer with another user, you can ask this other user to logon and ask to verify if Outlook is still working for him or her.
Go in order so you have best chance of getting back to your inbox as quickly as possible. When the resetnavpane command is executed, what it does is it resets and removes all the customizations related to the navigation pane. In some scenarios, doing so fixes the "Outlook will not open" issue. 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.
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. Microsoft has its own tool for automatically scanning and correcting Office when things go awry.
You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// and Office updates, click the link below.
My question is, how can I see what document is Outlook referring to? In Outlook thru Office.com, the account has no issue. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
It gets better https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// because you also resolve all the Outlook opening issues. 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. Restarting your device clears temporary files and can fix minor software conflicts. Should you decide to remove a profile, back up the data files first.
None of the events or information was lost in the move to the new calendar. The Family group calendar now appears in the Outlook.com groups area in the left nav on Outlook web and in the groups area of the Outlook mobile app. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com. Your browsers can automatically disable some of Outlook web features which can lead to this issue. When you log in to your Outlook web account, but couldn’t do so. For this, go to the Microsoft service status page and look for Outlook.com and see if the icon is red or yellow.
When you use a pst-file, it could be that an issue with that pst-file is preventing Outlook from starting correctly. When typing, please note the space between outlook.exe and /resetnavpane.If you encounter this issue more often, see this Quick Tip to find a more definitive solution. When typing, please note the space between outlook.exe and /safe.For alternative methods of starting Outlook in Safe Mode see this Quick Tip. As @ode2joy said, clearing out the user’s profile usually works, which is a more thorough procedure than just deleting .nst and .ost files. I have found that when this happens its due to the Account in windows needing to be updated. If you close outlook(make sure its not in the system tray) then click on start and type Domain, then find Access work or school.
It repairs corrupt or damaged Outlook PST files and helps you access PST data. 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 https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// use the troubleshooting steps we're providing below to help resolve these startup issues. Since several different problems can cause Outlook not to open, you may have to try multiple fixes before your issue is resolved. Here, we list fixes for the possible causes, starting with the most likely culprit.
If you are having trouble locating scanpst.exe you can also use OutlookTools (free!). For a step-by-step guide on how to https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// work with scanpst.exe see Using the Inbox Repair Tool (scanpst.exe). For more detailed instruction on how to enable or disable add-ins see this Quick Tip.If you you get an error that you cannot disable the add-in see this Quick Tip instead. If you share this computer with another user, you can ask this other user to logon and ask to verify if Outlook is still working for him or her.
Go in order so you have best chance of getting back to your inbox as quickly as possible. When the resetnavpane command is executed, what it does is it resets and removes all the customizations related to the navigation pane. In some scenarios, doing so fixes the "Outlook will not open" issue. 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.
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. Microsoft has its own tool for automatically scanning and correcting Office when things go awry.
You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities. To install the latest Windows https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// and Office updates, click the link below.
My question is, how can I see what document is Outlook referring to? In Outlook thru Office.com, the account has no issue. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
It gets better https://fixoutlookhelp.wordpress.com/2025/10/29/repair-outlook-ost-and-pst-files-2025-guide// because you also resolve all the Outlook opening issues. 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. Restarting your device clears temporary files and can fix minor software conflicts. Should you decide to remove a profile, back up the data files first.