Hi,
Thanks for the info.
This:-
Level 2 support said if that hadn't worked, the next step would have been to delete all Start Up launch agents and then restart allowing them to regenerate themselves.
seems a little excessive.
My Hard Drive/System/Library/LaunchAgents folder contains 282 items
I have another 7 items in Hard Drive/Library/LaunchAgents that belong to items I have Installed that are used by All Users.
For me the last seven are trusted items in that I know what they belong to (Java update info to run Adobe products, some Adobe stuff itself, the Little Snitch install and an item to do with my Printer)
There is one item there though that does refer back to when this Mac User Account was migrated from a G4 computer.
I do know that Apple are still looking into the cause of this and phone calls to Apple Support are likely to go through various changes as they eliminate stuff.
9:22 pm Tuesday; January 24, 2017
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
iPhone 6 iOS 10.x and an iPad (2)