IDT Audio Drivers Won't Install - Windows 7x64, Clean Install?

I'm working on a re-install of all components following a complete corruption of the boot sector on my drive which could not be fixed with repairs. The last time I installed everything fresh, I had no issues. Between then and now, there have been no hardware changes on my system, but now I am having issues installing the IDT Codecs. I keep getting an error along the following lines: Quote: ExitError: Error=Device Object not present, restart the system and run setup again. Running under compatibility mode, and running drivers from both the motherboard CD and the manufacturer website both have the same effect. The CD, when booted, says "This OS not support!" and only contains 32-bit vista codecs. ECS' website download indicates the IDT drivers as being compatible with Windows 7. Both do not work. It is almost as if the hardware "disappeared," despite the fact that I was using the drivers quite successfully till just 2 days ago, when the boot sector went kaput.

Windows has installed its own default set, which do nothing to power the 8mm jacks which I use with my speakers, but instead put sound through the HDMI, which is useless because I use a dedicated graphics card. I have tried uninstalling this codec and re-installing IDT, to no effect. Windows replaces with its own default codec.I have referenced this thread here, but offered solutions do not seem to work for me: Intel IDT Audio Driver will not install