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Enable AHCI mode without having to reinstall Win XP 1- Extract Toshiba A300 WindowsXP 32bit ICH9M.zip 2- Copy the iaStor.sys File into the \Windows\System32\Drivers\ 3- Run ich9m.reg 4- Reboot end enter BIOS and switch to AHCI-mode 5- Use the downloaded driver to install manually the driver when windows detect it. Before: After: Toshiba_A300_WindowsXP_32bit_ICH9M.zip