Microsoft Outlook crashing on opening on Windows 10

Copper Contributor

Microsoft Outlook crashing on opening on Windows 10.
I have tried repairing the ost files using scanpst, I have repaired Office (both off and on-line), I have uninstalled and re-installed Office, I have deleted my profile and started afresh (several times), I have reduced the size of my mailboxes and deleted items folders, I have used the Microsoft Support and Recovery Assistant (which turned off hardware acceleration on my video card), my Nvidia video card drivers are up-to-date, also Windows updates are up-to-date, I have run DISM and SFC, and scanned my hard disk for errors in preboot, I have run MemTest86 and I have disabled all but three (standard) add-ins - and STILL Outlook crashes on opening!
There are no logs in Event Viewer.
I have now worked out while Outlook crashes about 4 times out of 5 it does eventually start, however this is not really acceptable.
I am totally out of ideas.
Any help would be appreciated.

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