Check the 64-bit tags in this forum. There is a beta of SD you can install now. You need to send an email request to get it. It has been working flawlessly on my system. (Intel DG965GW, Core2 Quad, 4gb, dual SATA raid volumes, and multiple OS partitions (using Vista Ultimate SP1 with the beta). I don't know if it has any issues with other users. Frankly, from my experience I'm surprised it hasn't been released yet! Perhaps they were waiting for any Vista SP1 repercussions.