hp multimedia audio controller and pci communications - NO SOUND! UUUUUGGGGGH

About 2 months ago I update my hp pavilion a527x pc with XP repair via hp's update that came with system under F8 system thingy. I had the BSOD prior to that. After the repair of XP, I now have not had sound. AC7 realtek updates from hp and other sites have all resulted in same thing-hardware wizard updates after reboot but I/O system problem prevents the update. yellow flags next to multimedia audio controller and pci commuincations modem thingy. Searched forum on majorgeeks but not really helping-have even tried the disk approach but can't stop the automatic hardware wizard updating on reboot.
Any help will be appreciated.....I have the Everest and belarc nfo if necessary.
thanks

 

everest report upload

 

Thanks Mr. Administrator, I am going to jump right on it this evening-I've been working on that thing for a loooonnnngg time=simply trying to handle it and learn.
ck by at you either way.
THANKS BIG!

 

Halo
Thanks for info on properly installing sound. I have attempted all you advised to no avail. I continue to receive on the PCI and Realtek an error from the wizard that the hardware experienced a problem and could not be installed. Also I installed the UAA thingy but nothing updates. Is that an automatic update or am I to go and update? I went to windows update but the screen after about 2 minutes indicates the website has encountered a a problem and cannot display the page.....Still no sound...please,please advise.

thanks greatly again.:confused

 

Thanks again Mr. Halo for the nfo given.I have tried all you advised but the pci n realtek just will not install.sp3 also will not update. in fact, win update pg no go. no sound still plz help again.