DirectX (Direct3D) disables itself

Hi guys,
just wish to thank user "the thinker" for the tip. I googled for hours just finding stupid nosense posts by stupid people, with no idea what they were talking about... wasting my time.
Then, finally, I found this forum and this thread with the solution to my problem.

Moreover, I wanna specify that in my case, the registry key name was "EmulationOnly". Setting it to "0" I got all three DirectX features enabled. So I solved my problem running a game, that probably needs these features enabled to work properly.

Wondering why M$ guys, don't suggest this on their support page: DirectDraw or Direct3D option is unavailable
The fix it's quite easy to do.

I've no idea why the DirectX features were disabled; I did not and since few months ago they were enabled. I can't figure out.

Once again, thank you all for have fixed my problem!

UPDATE: I reported this fix on the above M$ support page. Hope they will add it as Method 9.