UE4 extreme lag impossible to use

Hello i worked with unreal before it was above perfection, but now i have a serious problem when i open any scene My Game - Blank Scene, Fps scene doesn’t matter i have EXTREME lag first of all need about 1-2 hour just to show the interface, when i move with cursor again got blocked. makes impossible to use totally impossible. Do you guys have any solution ? I work before 1 day it was perfect, today its impossible to open a scene not even work !
same happens when i click on Lauch Project when menu is spawned when you need to select which project do you want to open lag start i can’t even open any scene. nothing else lag execpt UE4, My pc works fast in background.
Last thing i’v done is Update my graphic card to it’s latest graphic update 18.2.2 patch.
im using AMD R9 200 Series.
But i downloeded older version via browser to Downgrade my GPU driver to 17.2.1 and still i have the same problem…
please someone help me ! or do you have any solution how to fix this ?

Finally came to conclusion.
i tried everything nothing works spend my all night searching still nothing, last thing comes to my head was i must fix by myself.
if anyone encounter with same problem you are welcome i got fix for you !
like i said i use AMD R9 290 (R9 200 series) idk if this one will work for older versions of R9, Rx, Fury and so on i tested only on my graphic card !
FIX !
i download older version of RADEON 16.60 Patch and fix my Extreme LAG. I tried with 18.2.2 , 18.2.1
17.2.1, 17.2.2 Nothing works lag strikes again ! for now only patch it works and fix lag is 16.60 !
I download patch from
http://ftp.nluug.nl/pub/games/PC/guru3d/amd/[Guru3D.com]-whql-win10-64bit-radeon-software-crimson-relive-17.2.1-feb28.exe