[header] How to install ahci support for ati sb600 sata controllers on existing windows installations [title] Back up your critical data, and especially your registry. [step] There are lots of programs out there to do it. Hopefully you won't have to use your backup, and the procedure is pretty safe, but consider yourself warned anyway. 
[title] Make sure ahci is disabled in the bios. [step] If it's enabled and you can boot into windows, you don't need this walkthrough.