Can Anyone Help me! I Would like to conect my Sony DAV-S880 Compact AV system to my Hp PC, what is the best option and what cable type do I need to used. Thanks!

Hi there
you can connect this system to your computer in multiple ways. But how you do so depends on what your computer has. If your PC has RCA connections on it then that would be the simplest way but this would leave you with stereo sound. If you have a digital decoder in your computer and a optical out then i would suggest using that. A Optical cable is quite inexpensive and can be bought from pretty much any decent A/V shop. 
If you can let me know the model of you PC i can give you exact directions but dont be afraid to play around yourself. I only suggest that you do so carefully.
hope this helps.