ASRockX99 Extreme6, Win10+UEFI = Couldn't shutdown

Try turning off Fast Startup

Installing any version of Windows in UEFI mode with any mother board requires at least one setting in the UEFI, and choosing the correct entry for the Windows 10 installation media in the boot order.

When you said in your first post you were installing Windows 10 from a USB flash drive, booting in  UEFI mode, what did you do to accomplish that? You also said you changed to Legacy mode, and you did not have the shutdown problem. How did you change to Legacy mode?

There are several ways to get Windows to install in UEFI mode. Use one of these three configuration methods:

1. Set the CSM option to Disabled.
2. Set the CSM option to Enabled, and set the Launch Storage OpROM Policy CSM sub-option to UEFI Only.
3. Set Secure Boot to Enabled (this automatically set the CSM option to Disabled.)

Options 1 and 3 require the PC's video source VBIOS to be GOP compatible. Option 2 does not require the PC's video source VBIOS to be GOP compatible.

Then Save and Exit the UEFI/BIOS. Go right back into the UEFI, with your Windows USB flash drive installation media in a USB port on the board's IO panel.

Go to the Boot screen, and in the Boot order find the entry for your Windows 10 installation USB flash drive that is: "UEFI: <USB flash drive device name>", where USB flash drive device name is simply the name of that device as recognized by the board's UEFI firmware.

That entry is the one you want to boot from. If you see another entry for the USB flash drive with the prefix "AHCI" or "RAID", instead of "UEFI", do NOT choose that entry.

The only other drive that should be connected to the PC and connected to power is the target OS drive. It should be empty, or have a large empty partition that will be used for the Windows installation. If the target drive or partition has any sub-partitions on it, they should be deleted before the installation begins.

I have installed Windows 7, 8, 8.1, and 10 in UEFI mode many times on many ASRock mother boards, including Z77, Z87, Z97, X99, N3150, and Z170 chipset boards. They all work correctly, if you mean they could be shutdown normally. Many other ASRock board users have done that too.

Anyone that is using a PCIe type SSD must use a UEFI booting Windows installation. ASRock has had the correct Option ROMs in their board's UEFI/BIOS, and the UEFI configuration options for UEFI booting in their board's firmware for about five years.

The only time I have had a problem with a shutdown not working on a UEFI booting Windows installation is when I cloned a Windows installation from one drive to another. I think that is related to the Windows Fast Startup feature. I've never had that problem with a fresh, new Windows installation.


Edited by parsec - 05 Apr 2016 at 2:35pm

Finally, I've found a solution !!! - I try to update existing updated firmware 2.10 to same version 2.10 again (but previously updating didn't fail, it ended by success), and everything works now.

Some new features about my problem:

mbtech wrote: Some new features about my problem: - PC run normally for less than 24 hours (after my written operations, with enabled "Windows Fast Startup"). - Today, PC has same problem with shutdown again, so I tried to disable Windows Fast Startup, and it works - this option has affect to funcionality of shutting down process. - Also I tried to updating/rewriting BIOS to same version 2.10 again, and enabled Windows Fast Startup, it works too, but I don't know how long - I already made this method and it seems to be not permanently solution of this problem. Please, do you think, that is normally for this motherboard, that I have to disabled "Windows Fast Startup" for correct funcionality ? Couldn't be some hardware problem and reason for claim ?

Problems with the Windows fast startup feature are not unusual, many people with many different kinds of mother boards and PCs have the issue and must disable fast startup.

Why the problem happens is not exactly known. Windows fast startup creates a file that saves certain information that this feature uses to work. By disabling this feature, I believe the file that is used is created again once fast startup is re-enabled. But the PC must be shutdown and started at least once for the file to be created again, when fast startup is enabled again.

Since fast startup is a Windows feature, that was introduced in Windows 8, if special UEFI/BIOS settings were needed, they would have been well known by now. Fast startup is a Microsoft/Windows feature, they are responsible for it but all they can tell someone is to disable it if it causes problems?

No, it is not normal for any mother board to need fast startup to be disabled. Many people have the same board as you, and don't have this problem. I have had the problem with shutting down the PC that was stopped by disabling fast startup on my ASRock X99 board, and other, different chipset boards. For me, installing Windows (8.1 or 10) solved the problem. Why you still have the problem, or why it comes back after a while (IF it does come back) is a mystery.