Greetings... System is running ok with Catalina 10.15.5 with the exception of the odd annoying graphics related issues, notably, when launching iTunes, my cloud library freezes the system, graphics artifacts, flashing, etc forces me to shut the system down. This behaviour also happens randomly when I access various webpages, unpredictably. Any explanation, or assistance with this annoyance would be most appreciated. Thank you.
Dell Optiplex 3020
i3-4160
HD4400
8GB
EFI.zip