Install Windows 10. Run Windows Update. Install Intel MEI 8.1 manually. Ignore the Lenovo website. Your PC will run perfectly.

If you prefer not to hunt for individual drivers, the Lenovo System Update tool can automatically detect your hardware and install the correct versions. Hardware Compatibility Tips Supports up to 32 GB of DDR3 memory across 4 slots.

Run the installers in this exact order: Chipset →right arrow →right arrow →right arrow →right arrow

The IS6XM board uses an Intel chipset (likely Intel H570 or B560 depending on the exact CPU generation) but is designed for gaming desktops. You will need both an Integrated Graphics driver (for the CPU) and a Discrete Graphics driver (for the GPU card).