You can start Outlook in safe mode, disable your steps to fix Outlook not opening add-ins, and then try to open Outlook normally. If you can't open Outlook, or Outlook disappears or crashes, one of your add-ins may be to blame or you may need to update Outlook. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers.

The error message contains the error code and its short description. Most users tend to ignore these error codes,but they actually provide valuable information about the root cause of the problem. Outlook has a location where you can manually add approved email addresses to the steps to fix Outlook not opening Safe Senders list and ensure they never end up in your junk mail.

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. This option could be useful if you constantly have to wait for Outlook to rebuild its data file when you restart. No matter how well written add-ins are steps to fix Outlook not opening (and even Outlook itself), there will always be the occasional Outlook problem that doesn’t seem to go away or may not be related to add-ins at all.

Technical people fix this error based on possible reasons. It's a by-product of making more space on your PC, you delete things you don't think you need anymore. 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.

When your mail profile is damaged, Outlook often fails to start as well or you’ll find yourself encountering one error after the other. steps to fix Outlook not opening One of the first and most effective steps is to launch Outlook in Safe Mode. This mode turns off all add-ins and custom settings, helping you quickly identify if a third-party add-in is causing the startup problem. After running any of the above processes, make sure you check for updates again to verify that all updates have been installed. Did Outlook still work correctly the last time you used it?

After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running. In this case, sign in to the Microsoft 365 portal by using your administrator credentials, and then select service health to determine whether other customers are experiencing the same issue. If other customers are experiencing the issue, the issue should end when the service-interrupting event is resolved. If you’d like to share any feedback about this article, please let us know.

To resolve this Outlook issue, you can follow our comprehensive guide on How to Fix Outlook Search When Not Working. In case your Outlook PST is corrupt or damaged, you can always look for third-party Outlook PST Repair Tool to fix the issue. Inbox Repair Tool or ScanPST.exe steps to fix Outlook not opening is a free utility provided by Microsoft. However, for severely corrupted PST files, it’s recommended to use a third-party repair tool.

Regular backups, staying vigilant for signs of corruption, and knowing when to use the right repair tools are essential practices. In cases of severe corruption, it is recommended to use a professional repair tool like the SysCurve PST Repair Tool. This tool is adept at addressing serious damage that basic repair methods might not fix, efficiently helping to repair corrupt PST files without hassle. This approach is particularly useful when the original PST file is not severely corrupted but has minor issues that prevent normal operation. It can also be used when you can open the PST file but experience errors or issues when accessing certain data within it. PST files are essentially data storage files used by Microsoft Outlook.

For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We're investigating the issue and will update this page when a fix is available. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. This issue affects Outlook 2007, Outlook 2010, Outlook 2013, and Outlook 2016. After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface. Follow along with the video below to see how to install our site as a web app on your steps to fix Outlook not opening home screen.

A damaged or corrupted Outlook user profile is a common reason for "Outlook won’t open" errors. Creating a fresh profile can provide a clean slate for Outlook to start. Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. 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 steps to fix Outlook not opening "Cannot start Microsoft Outlook. Cannot open the Outlook window" error messages?