Outlook unable to load

Try these steps in order:

1. Start Outlook in safe mode.
   • Press Windows key + R.
   • Type Outlook /safe and select OK.
   • In Choose Profile, accept the default profile and select OK.
   • If Outlook opens in safe mode, the issue is likely caused by an add-in.
2. Disable add-ins if safe mode works.
   • In Outlook, go to File > Options > Add-ins.
   • At the bottom, make sure Manage shows COM Add-ins, then select Go.
   • Disable the add-ins and restart Outlook normally.
3. If Outlook does not open in safe mode, create a new Outlook profile.
   • A corrupted profile can prevent Outlook from opening.
   • Create a new profile using the steps in Create an Outlook profile, then restart Outlook.
   • In the Choose Profile dialog, select the new profile and choose OK.
   • If Outlook starts normally, the original profile was corrupted.
4. Repair Outlook data files if needed.
   • Exit Outlook.
   • Run the Inbox Repair Tool (scanpst.exe) using the steps in Repair Outlook Data Files (.pst and .ost).
5. If Outlook hangs at loading profile after an update, end Office processes and disable presence features.
   • Open Task Manager.
   • End all running Office processes.
   • In Outlook, go to File > Options > People.
   • Clear:
     • Display online status next to name
     • Show user photographs when available
   • Restart Outlook.
6. If the problem is specifically that an Outlook app or add-in does not load data, check the UseOnlineContent registry setting.
   • This applies to Outlook 2013 and Outlook 2016 when Apps for Outlook do not load correctly.
   • If UseOnlineContent is set to 0 or 1 under:
     • HKEY_CURRENT_USER\Software\Microsoft\Office\<x.0>\Common\Internet
     • or HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\<x.0>\Common\Internet
   • change it to 2.
   • Warning: editing the registry incorrectly can cause serious problems. Back up the registry first.
   • If the value is under the Policies hive, an administrator must change the policy.

• I can’t start Microsoft Outlook or receive the error “Cannot start Microsoft Outlook. Cannot open the Outlook Window” | Microsoft Support
• I can’t start Microsoft Outlook or receive the error “Cannot start Microsoft Outlook. Cannot open the Outlook Window” | Microsoft Support
• Outlook won’t open or is stuck at loading profile | Microsoft Support
• Apps for Outlook app does not load data in Outlook 2013 or Outlook 2016
• Apps for Outlook app does not load data in Outlook 2013 or Outlook 2016