• Reboot your PC so all Outlook Process are closed.
  • Login
  • Press the keyboard shortcut Win+R to open the Run dialog box. Or, type run in the Windows Search box and press Enter.
  • In the Run dialog box, enter outlook.exe /safe and select OK.
  • In the Choose Profile window, choose the default Outlook option and select OK to open that profile.
  • Outlook starts in safe mode.