I was playing a 3d MMORPG called Martial Heroes and a football game called 'Pes 2008' (lots of people know this game) I had been playing those games for around 5 months and then suddenly these errors came. So I tried to get another game called Dekaron/2Moons, but even that game wont work. All games which were 3d dont work Low Graphic games work though^^
Btw, I am using Windows Vista skin's , so I dont have Windows Vista.
MartialHeroes error -

Dekaron/2Moons error -

Those are the problems. They are somehow similiar to DirectX problems...
This is my DirectX diagnostic tool -
I am using DirectX 9.0

My Display/Graphic Card :
NVIDIA GeForce 7300 LE
Help would be really appreciated in this complicated problem! Some PC techs i have worked with couldn't still work this problem out!
This problem has been now nearly a month I suppose. Hopefully i get alot of replies! If you need any info please REPLY! THANKS ALOT!