I see that you loaded the latest BIOS version - 0021 - which is good, But we have also identified certain settings that you'll need to make in BIOS before you try installing Windows 7. Please check the document on that here: http://downloadmirror.intel.com/23573/eng/DN2820FYK_OS_install_v01.pdf.
Please let me know if these steps do not work.
Thank you for the reply. I had seen and applied those settings in the BIOS prior to loading Windows 7.
My suspicion is that the issue is with the disk subsystem. At one point (I think with the old BIOS) that I tried loading in safe mode (gives you a list of drivers as it loads) and that is where it choked. After updating to BIOS 21, it never makes it that far - just gives me a BSOD with the ACPI error.
Note, I have Windows 8 and was able to load it, but my goal is to run this system with 7.