Finaly I found my problem of lost DirectX on my W2K PC
It was so simple that I could laugh.
Here is the explain of the problem : Netmeeting was working in the background and showing no icon in the taskbar......
Netmeeting can create many strange things like prevent of resolution change, disable some hardware functions and so on.
So if someone has the same problems of Directdraw/Direct3d try to unload Netmeeting from running apps. (don't remove it because it's part of W2K kernel)
In any cases many thanks to : UncleClive, liaqatali, sxamiga, Badaro who tryed to help me.
It was so simple that I could laugh.
Here is the explain of the problem : Netmeeting was working in the background and showing no icon in the taskbar......
Netmeeting can create many strange things like prevent of resolution change, disable some hardware functions and so on.
So if someone has the same problems of Directdraw/Direct3d try to unload Netmeeting from running apps. (don't remove it because it's part of W2K kernel)
In any cases many thanks to : UncleClive, liaqatali, sxamiga, Badaro who tryed to help me.