i believe that i have had a VERY SIMILAR problem ... this is what i did
CONTROL PANNEL >> ADD HARDWARE
go through with it >yes i have already connected the hardware
now it MAY have a yellow question mark beside it .. and then install it automatically
try installing everything with audio in the name ...
this may take like half an hour cause there were ALOT if things i had to install
i hope this helps ...
ashain.boy@gmail.com
email me to tell me the results