Had a coworker show me something interesting this morning on our Windows 10 desktops. Our workplace is standardised on Windows and uses Microsoft Teams for chat (Microsoft folded Skype under Teams and is deprecating Skype.).

Open Task Manager and note the CPU usage.
Go to Outlook File->Options->Add-ins Manage: COM Add-ins Go... and uncheck, Microsoft Teams Meeting Add-in for Microsoft Office.
Go back to Task Manager and note Disk usage.
Mine dropped from over 60% to under 5%