outlook is not opening

Question

outlook is not opening. so i could not access my mail

Answer 1

Hi, What exactly happens (any error message or nothing opens)?

Have you tried accessing your email using Outlook on the web? If not, please try here: https://outlook.live.com/mail/ and let me know if it works.

Answer 2

Try these steps in order:

1. Start Outlook in safe mode to check whether an add-in is blocking startup.
   • Press Windows key + R.
   • Type Outlook /safe and select OK.
   • In Choose Profiles, accept the default profile and select OK.
   • If Outlook opens, the issue is likely an add-in.
2. If Outlook opens in safe mode, disable add-ins.
   • In Outlook, go to File > Options > Add-ins.
   • At the bottom, make sure Manage shows COM Add-ins, then select Go.
   • Clear all selected add-ins, then select OK.
   • Restart Outlook normally.
   • Re-enable add-ins one at a time to find the one causing the problem.
   • Do not use Remove during troubleshooting. Disable the add-in instead.
3. Reset the Navigation Pane.
   • Close Outlook.
   • Press Windows key + R.
   • Type Outlook.exe /resetnavpane and select OK.
   • This removes Navigation Pane customizations.
4. Create a new Outlook profile if safe mode does not help.
   • Create a new profile by following Create an Outlook profile.
   • Restart Outlook.
   • In the Choose Profile dialog, select the new profile and choose OK.
   • If Outlook starts normally, the original profile was likely corrupted.
   • Warning: if removing an old profile later, back up data files first. Offline cached content is deleted when Remove is used.
5. Repair Outlook data files.
   • Exit Outlook.
   • Run the Inbox Repair Tool (scanpst.exe) using the instructions in Repair Outlook Data Files (.pst and .ost).
6. If this is classic Outlook for Microsoft 365 on Windows 10 or later, run the Microsoft troubleshooter.
   • Use the classic Outlook startup troubleshooter from Get Help.
   • It can diagnose and fix several common startup issues.
7. If the error includes “The attempt to log on to Microsoft Exchange has failed” for a Microsoft 365 mailbox, use Outlook Web Access (OWA) or new Outlook for Windows as a workaround and open a support case from the Microsoft 365 Admin portal. In that case, Exchange Online support must request a service-side mitigation.
8. If this is Outlook 2010 on Windows 7 or Outlook 2013 on Windows 7/8, check compatibility mode.
   • Find Outlook.exe.
   • Right-click it and select Properties.
   • On the Compatibility tab, clear Run this program in compatibility mode for.
   • Select Change settings for all users and clear the same option there.
   • Select OK twice.

---

• I can’t start Microsoft Outlook or receive the error “Cannot start Microsoft Outlook. Cannot open the Outlook Window”
• Error when opening classic Outlook: "Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The attempt to log on to Microsoft Exchange has failed."
• Outlook is unable to start in Windows 7 or 8