MSI Z170-A Pro Motherboard I Can't Find the Secure Boot Option in the BIOS

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WAG12

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Jul 24, 2017
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I'm using a MSI Z170-A Pro motherboard BIOS version 7971v1l. Secure Boot is turned off and I can't find anywhere in the BIOS to turn it on. I was using a hard drive that was partitioned MBR and I cloned it using Aomei Backupper to another drive that was partitioned GPT. I'm using Window 10 64-bit and when I ran the msinfo32 on the MBR drive it said BIOS: Legacy and Secure Boot: Unsupported. Now on the GPT drive it says BIOS: UEFI and Secure Boot: either disabled or turned off. I looked in the manual and there is nothing in the manual about secure boot so I'm coming to the conclusion that the BIOS doesn't support Secure Boot. Does anybody that has this motherboard have Secure Boot enabled or turned on?

Thanks
 
Solution
alexoiu
From the board's manual:
"This sub-menu will appear when Windows 8.1/ 10 WHQL Support is enabled"
in Advanced / Windows OS Configuration
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WAG12

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I guess you are right as I was able to find and turn on WHQL Support in the BIOS and then the Secure Boot option appeared. I turned WHQL ON but left Secure Boot OFF and rebooted the computer. But now I can't get back into the BIOS. I can boot into Windows but if push the delete key when the computer is booting up it just stops responding I don't get into BIOS or Windows and the monitor light goes from green to orange. So I had to clear the CMOS to get back into BIOS and had to turn WHQL off to get the computer working again. My drive is only 1TB and I kept the original drive that is MBR so I can easily go back. I just thought it would be nice to be able to use the secure boot to help prevent some of these attacks that target your boot sector. I'm building another computer at the moment so this time I guess I want to make sure I have WHQL turned on before I install the OS and make sure I install to a GPT disc. Should I leave secure boot off until I have everything installed and working good?
Thanks for your help.
 
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WAG12

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If you google MBR2GPT tool you will find that if you have the Creator's Update for Windows 10 then this tool is now included that will make it easy to convert from MBR to GPT. I'm going to give it a try and I'll let you know if it worked and how easy it was.

 
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WAG12

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Much thanks to both alexoiu and SkyNetRising you were both right on with your advice. If you Google Windows Central mbr2gpt you find very complete instructions on how to convert from MBU to GPT. The procedure sounds very easy if you have the Creators update for Windows 10 installed. But the tricky part is passing the validation phase and I struck out on all three of computers that I tried. I kind of expected it on two of the computers as they both had older 790GX motherboards and had been upgraded from Windows 7 to Windows 10. The third one surprised me as it was a Z170 motherboard only 1 year old and had Windows 10 installed on it right out of the box. In all three cases right before the validation failed it said the disk sector size was 512 bytes. it said the One problem I encountered was after doing the creators update I lost 5 out of 6 of my advanced options on two computers and only one still had all six. So I had to create a windows repair disc on that computer to use it on the other two as they would no longer let you make a repair disc and were no longer available going to settings advanced options either and the old repair discs I had made for them didn't support mbr2gpt. I'm building another Z270 system, so at least now I know to format the drive GPT before installing Windows 10. I bought Windows 10 on a USB stick so I'm hoping I won't have any problems installing it on a GPT drive.
Thanks again for your quick response.
 
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WAG12

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I also found a solution to missing some of my Advanced Options in Windows 10. By opening a Command Prompt and typing in the following and then hitting enter brought them all back:

reagentc /enable
 
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