How to Repair Outlook 365 on Windows 10?

Outlook is a well-known email programme that Microsoft offers with an Office 365 subscription. But many people frequently experience problems with Outlook, such as when it stops working or displays the error message "Failed to launch." These problems are especially prevalent for users of Office 365 programmes on Windows 10.

  • Causes of the "Failed to launch" error in Outlook
  • According to user reports, the issue could arise as a result of the following:
  • Issues with the Office programme
  • Damage to the Outlook profile
  • Damaged Outlook Data File (.ost/.pst)

Other factors, such as installing a new program containing viruses, might occasionally cause PST files to become corrupt. It cannot be easy to repair if you regularly use Outlook 365 for business emails on Windows 10. In this article, we've covered a few techniques to Repair Outlook 365 on Windows 10

Techniques for Fixing Outlook 365 on Windows 10

Method 1: Application of Microsoft Quick Repair

Microsoft offers a free troubleshooting tool for Office 365 applications that can fix most of the typical issues with such products. While it might not be useful in resolving all issues related to Office 365 applications, fixing typical problems like Outlook or other software that isn't functioning properly is simple. Observe the instructions below:

  • Open Settings by going to the Start menu, clicking the Setting icon, or typing Settings into the search box.
  • To view all the installed apps on your Windows 10 computer, choose Apps & features.
  • To view the choices, select the Microsoft 365 app and click on it. Change and Uninstall are the two choices that you will see. Office 365 can be fixed by selecting Change.
  • The User Account Control Prompt will show on the screen, as you can see. To see the repair dialogue box, select Yes.

There are two methods—Quick Repair and Online Repair—for fixing Office 365 apps. The usual problems will be promptly fixed using Quick Repair. To address all app-related issues, reinstalling Office 365 apps is a necessary step in Online Repair.

You can lose the customisation and settings for Office 365 if you select the online repair option.

Method 2: Uninstall & Reinstall Outlook 365

You can uninstall and reinstall your Outlook 365 application if it isn't operating properly. This will assist you in removing any corrupt files that may be the root of the issue.

The procedures to delete and reinstall Outlook 365 on Windows 10 are as follows:

  • If Outlook 365 is currently open, close it.
  • Enter "appwiz.cpl" in the Run window and click OK.
  • Locate Microsoft Office 365 in the list of installed apps and click on it in the Programs and Features window.
  • Select "Uninstall" from the menu.
  • To finish the uninstallation procedure, adhere to the instructions.
  • Restart your computer after the uninstalling process is finished.
  • From the Microsoft website, download and install the most recent version of Outlook 365.
  • Open Outlook 365 and log in using your credentials. Now, your account ought to be operating normally.


All of these techniques work to solve the problem. However, if you still have issues with Outlook 365, we highly recommend using the program we've suggested because it has great features that make it simple to fix faulty or damaged PST files.

You can install the software's trial version for free and give it a try before buying the complete version.

  • Mick Jone
  • Category: Email
  • Last Update: 4 months ago