what did you do in the BIOS? did you change a setting or what? If you did what settings changed?
When you say update the BIOS, What are you refering to? Did you flash the Bios and it didn't work?
I need to know what your chipset (northbridge) is... Is it VIA? Because considering you have an onboard SATA controller, you are going to need to the drivers for your Southbridge...
Ex:
Northbridge: VIA K8T800
Southbridge: VT8237
If you aren't sure... Then just give me your exact motherboard make and model and I will get everything that you need. Don't pay attention to the other crap on this thread as most of the information is useless.