Microsoft Office 365: Slow Boot / Old Programs Opening on on Macs

  1. Fully close out of all Office applications (Outlook, Word, Excel, PowerPoint, etc) and left-click on your desktop. Go up to your menu, select Go, and then Computer.

Screen Shot: Go, Computer

  1. When Finder appears, select Macintosh HD. Once inside, search "MicrosoftRegistrationDB.reg" - a file of that name should pop up. Move this file to your trash and then empty the trash.

MicrosoftRegisrationDB.reg file: delete and empty trash

  1. Once finished, open Word and log in. Your office programs should launch quicker.
  2. For further clarification, see https://techcommunity.microsoft.com/t5/Excel/Excel-2016-for-Mac-when-launched-it-says-open-last-saved-file-or/td-p/128195
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