manic

Afaik that board should be ok for vista. When you installed vista
was that on a clean hdd, ie formatted with something like killdisk?
Remnants of the of the old os could be giving you the problem.
Make sure bios is configured properly.
Just read your other post, did you go into bios and tell it to treat
sata drives as ide? Insure raid is disabled. Make sure to install
mobo drivers...Is the sata drive plugged into the sata port or the
raid port, it should be in the sata port.
Another thought you may have to get updated chipset drivers for
vista. I believe those are the 875intel chipset drivers.