Why Can I Not See The Sata Drives When Trying To Install Windows 7

I have downloaded the drivers from the ACER website and made sure they are the correct ones (nVidia based chipset). The driver installer searches/finds the drivers and when trying to install it just goes back to point 1 (To upload the drivers).

I have tried:

-updating BIOS (it has the latest one)

-Physically checked all the SATA connections and made sure they are properly connected.

-I have removed the RAM for a a bit to make sure the RAM memory is not with old info.

Any help will be appreciated!