UE4 prolem : Screen like Frozen no refresh in it

Hello ,
Got problem with games that run on UE4 , game start normally but screen doesn’t update looks like frozen i can still hear sound and react with screen but its like i’m missing in game refresh , this i know cos when i open 1 more window and and drag it over game window it does update 1 frame , my config is CPU:Phenom II x6 , GPU:RX 470 4gb with latest drivers Adrenalin 2020 .I think this was one of reasons why i didn’t update drivers for long time(4 years) , is there an solution or some fix for this problem now?
Thanks