I downloaded the file "motherboard_driver_bootdisk_nvidia_vistax64.exe" from Gigabyte.
I tried in on a computer with Windows 7 Ultimate 64-bit. It did not work even in compatibility mode.
I tried in on a computer with Windows 7 Home Premium 32-bit. The file ran fine with 6 files extracted. These are the files:
12/22/2006 08:17 PM 379,392 IDECOI.DLL
12/27/2006 11:47 AM 9,964 NVRAID.CAT
12/22/2006 08:17 PM 385,536 NVRAIDCO.DLL
12/27/2006 01:43 AM 6,450 NVRD64.INF
12/22/2006 09:58 PM 157,992 NVRD64.SYS
12/22/2006 09:58 PM 120,104 NVSTOR64.SYS
6 File(s) 1,059,438 bytes
I tried in on the computer with Windows 7 Ultimate 64-bit again.
This time I ran Windows XP Mode which emulates Windows XP Pro 32-bit. This time it ran fine and extracted the 6 files.
Do you have access to another computer with a 32-bit Windows?
If not you can run the file in Windows XP Mode if your motherboard and CPU supports it.
Windows XP Mode is a free download if you have Windows 7 Pro or Windows 7 Ultimate.