Dear Mr Shane and Neroilo, 
Thank you so much for yours assistance.
I've d/loaded and runned both CodecTweakTool and K-Lite- Codec .
As result was to rework Windows Media Player that, months was off.
Keep in mind that at the CodecTweakingTool the sub_option ( Start > Programs > K-Lite Codec Pack > Configuration > Codec Tweak Tool and check the box next to [Registry][b
] Fix non-working system sound.[/b]
 does not exist.
Finally due to the reason that Win Xp sounds still remaing off , i believe that somewhere a have make a "fatal error", please do me the favor and stop dealing more , i can live excluding windows sounds 

 .
Have a nice afternoon both of you 
My best regards 
Giannis