Lag happens immediately when I load the game after installation of directx jun2010 redist (directX 9 c).
When I undo the directx jun2010 redist installation with system restore Oblivion runs very smoothly when I install directx jun2010 redist all slows downs to 3 FPS and game eventually crashes.

I knew that before but it did not bother me because I could do fine without directx jun2010 redist. Now I need directx jun2010 redist for Morrowind Graphic and Sound Overhaul.

How do I fix this problem?