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ASRock X99 Extreme6 - Windows 10 + UEFI = Couldn't shutdown or sleep

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  • ASRock X99 Extreme6 - Windows 10 + UEFI = Couldn't shutdown or sleep

    Hi everyone,


    I have a new PC with this configuration:


    CPU: Intel Core i7 5820K
    MOBO: ASRock X99 Extreme6
    RAM: 4x Kingston HyperX FURY Black Series 8GB 2666MHz DDR4 Non-ECC CL15 DIMM
    Graphic card: 1x MSI R7 370 4GB
    SSD: 1x Samsung 840 EVO 1TB
    HDD: 1x HGST Travelstar 7K1000 2.5", 1TB, 7200, SATA III, 32MB
    Optical drive: 1x DVDRW/RAM Samsung SH-224FB 24x SATA
    Power supply: be quiet! STRAIGHT POWER 10 700W 80PLUS GOLD
    Case: Fractal Design Define R5


    I've done update of firmware to version 2.10 immediately at first startup, and then install Windows 10 from USB key booting in UEFI mode. I've installed all ASRock MOBO's drivers, installed MSI graphic card driver. And when I shutdown PC, shutting process start, then screen is turning off for a few seconds, and than welcome screen is appearing and I'm back in desktop. Simply, Windows couldn't shutdown in UEFI mode. It seems like a "restart", when I shutdown PC, but without POST process and without any Windows loading process.
    Also, I have problem when "sleep" command. When PC go to "sleep mode", only monitors are turned off and computer running below.
    The problems are only in UEFI mode, in Legacy mode everything run correctly.


    Does anyone have a similar problem?


    Thanks for any respond.
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