Access Violation error when clicking on the 'Connect' button (4242618)

Access Violation error when clicking on the 'Connect' button

When clicking the Connect button, with or without connection details entered, the following message appears:

'Access Violation at address 0000000003890000. Read of address FFFFFFFFFFFA78E8'

This message will appear in Toad even if all relevant permissions are granted and after a re-installation of Toad. It will also happen in any version of Toad that is installed on the machine.

Please restart the machine to resolve this particular error message.