Something's trying to start up, and trying to find the DLL (Dynamic Link Library).
I'm no expert, Kaya, but it could possibly be Malware. It can do no harm to download the free version of Malwarebytes, and let it scan your system.
If you search for either CT3306061 or TBverifier.DLL then you'll find that it's not a uncommon experience but never having had to deal with it I wouldn't like to recommend any particular solution.
If there are any entries for Conduit in your installed program list (you can find this in the Control Panel) then try removing those; more advanced uninstallers will also search for extra items that are left over; beyond that basic action I don't know what would be effective.
I really thought you had cracked it for me as the link looked so
promising.
I deleted the conduit entry but, unfortunately, when I re-started
the machine the 'Run DLL' was still there.
It looks as though I'll have to swallow my pride and get help
from the Grandchildren!
.......... just one more idea Kaya.
Assuming you downloaded Ccleaner.... you can delete "conduit" entries from "start up", but, run Ccleaner's registry cleaner as well. It sounds as though there are still "orphaned" entries in the Registry.