To see whether plugins are the problem, launch Microsoft Outlook while holding down the Ctrl key. Outlook will then startup in safe mode without loading any third-party add-ins.
One place to permanently disable such plugins in Outlook is to go to Tools > Options Other > Advanced Options > COM Add-Ins, or Add-In Manager.
To disable COM Add-ins:
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Select “COM Add-ins” in the Manage drop-down at the bottom of the Trust Center window and click “Go”.
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Uncheck any add-ins that you are not using.
Note: If you see “The connected state of Office Add-ins registered in HKEY_LOCAL_MACHINE cannot be changed” see www.cusabio.com cusabio elisa kit