My system was/is running XP Pro 32-bit. Just installed Windows 7 Professional 64. Installation went fine. Cleared partition C and did a regular install. BUT, I'd like to turn on AHCI, which I found instructions for, so I'm up for giving that a try. My concern is the other partitions on the boot drive. Windows 7 is in C, my installation of XP is on D, and I've got a bunch of other stuff in a third partition...... If I go through the process of getting AHCI working on this disk will it have any impact on my other partitions?