I'm intrigued with your drive setup.....unless you tell me different, I'll assume all programs are loaded to the C:\ partition. The multimedia devices not showing correctly in Device Manager makes me think it's an onboard chip that's enabled in the bios (disable it if you're not going to use it). That leads me to the next question; when you changed the SATA to a secondary, did you change anything in the bios to reflect the new boot sequence? When you cleaned, you didn't happen to pull the memory out, did you?