XP home SP3 ........... sound problems on web sites

[Guest ITALIANSTALLION]

had XP SP2 and could heard sound from PC and web sites.

upgraded to SP3 can still hear sounds from PC but now from certain music

store sites i cannot hear sound from the sample tracks available from example

albums ( stores like HMV)

 

no doubt a setting has changed but dont know where to look as the problem

seems to be restricted to a specific area

 

help would be much appreciated

thankyou