ASRock x99 Extreme 4 stopping boot to Windows 10
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=3949
Printed Date: 23 Jul 2025 at 2:09am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: ASRock x99 Extreme 4 stopping boot to Windows 10
Posted By: ualdriver
Subject: ASRock x99 Extreme 4 stopping boot to Windows 10
Date Posted: 05 Dec 2016 at 6:53am
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" rel="nofollow - Hello- Recently I replaced my old malfunctioning ASRock x99 Extreme4 MB with a new x99 Extreme4 MB. Now when I power the computer on, after the initial whirring of the fans and the drives, the POST/BOOT process stops and I get the screen copied below. I have to hit the F1 key in order to get the boot process to continue into Windows 10. I didn't get this with my old MB. What do I need to do to fix this? Thanks for your time. Copyright (C) American Megatrends, Inc. BIOS Date: 03/02/2016 20:38:06 X99 Extreme4 UEFI p3.30 Press F2 or DEL to run Setup. Press F11 for Boot Menu. Intel LAN MAC addresses are invalid in both CMOS and FLASH Press F2 or DEL to Run Setup Press F1 to continue
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Replies:
Posted By: ASRock_TSD
Date Posted: 06 Dec 2016 at 4:52pm
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Dear ualdriver, Greetings, this is ASRock TSD. Please follow the below steps to re-flash MAC address : Step 1. Please download the MAC Tool(Version 2.07A) in the link below: http://www.asrock.com/support/download/mactool.asp" rel="nofollow - http://www.asrock.com/support/download/mactool.asp Step 2. Put the file into a boot-able USB device and unzip it. Step 3. Reboot system then press[F11] to enter the Boot Menu. Step 4. Select your "USB device" in the Boot Menu, afterward ,system will enter DOS environment. Step 5. Please key in the command below: (1) DIR( press enter) (2) cd MAC207A( press enter) (3) MAC (press enter) (4) MAC c xxxxxxxxxxxx (xxxxxxxxxxxx is the MAC address which post in the edge of motherboard, 12 digits in total) After key in the command, the system will re-flash MAC automatically. Thanks! All the best, ASRock TSD |
Posted By: ualdriver
Date Posted: 07 Dec 2016 at 11:29am
thanks!
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ASRock_TSD wrote:Posted By: ualdriver
Date Posted: 24 Feb 2017 at 12:01pm
Hello- I can't get this to work. I downloaded the file, unzipped the file, put all the unzipped files onto two separate, freshly formatted USB drives, and am not having any luck. With one USB stick, when I hit F11 and select it, it just boots straight to Windows. With the other USB stick, I get an error that says "An operating system was found........" and when I hit any key to continue, it boots to Windows. Is there an alternate way to reflash the MAC address or can you provide me with some guidance on how to get the system to boot on the USB drive with the files on it? Thanks!
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