Cannot install Windows 7 because no boot device is recognized.

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The BIOS setting disable CSM in default in order to install Windows 8. If you need to install Windows 7, please enter BIOS setting and go to [Boot] tab. Click [CSM parameters] and set [Launch CSM] to [Enable]. Save and exit, enter BIOS setting again after reboot, then you can set up [Hard Drive BBS Priorities] under [Boot] tab.
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