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BIOS Update (Utility & Bootable CD) for Windows 10 (64-bit), 8.1, 8, 7 (32-bit, 64-bit) - ThinkPad Twist S230u. Individual Downloads. File nameBIOS Update ... Lenovo System Update is used to update, and install Lenovo drivers, BIOS and applications. ... Download the latest BIOS to the Windows Desktop for easier use.