The installation failed in the SAFE_OS phase with an error during BOOT operation

Q. I’ve been trying to install Windows 10 on my RV511 running Windows 8.1 (Pro) since last night. But every time my laptop restarts after “Your PC will restart in a few moments”, it gets stuck in the Windows logo (with no loading animation at the bottom). The only way to recover from this is to manually turn off my laptop and then turn it back on. Upon doing this, I get this message after logging in:

They couldn’t install Windows 10
They’ve set your PC back to the way it was right before you started installing Windows 10.

0xC1900101 – 0x20017
The installation failed in the SAFE_OS phase with an error during BOOT operation

I have checked the md5 checksum of the iso file and it checks out. I have also tried doing what others said in this forum (for example this one) but nothing seems to work for me. Right now I’m using a freshly installed copy of Windows 8.1 and so, there are no extra software (or apps) installed and I’ve also turned off Windows Defender.

One more thing. I have disabled automatic updates and I always skip downloading and installing updates during setup because I have a poor Internet connection. Could that be the problem?

For some reason, my “setuperr” file is empty. So, is there any (other) way to find out what is causing Windows 10 to not install?

My RV511’s specs are: Intel Core i3-380M clocked at 2.53 GHz, 5.8 GB RAM, 298 GB HDD (109 GB free in C drive) and Intel GMA HD Graphics (so, no “real” graphics card). As I said earlier, I just did a clean installation of Windows 8.1, so there are no ‘extra’ drivers or programs installed.

The name of the downloaded iso file is:



I have the SAME Gigabyte BRIX. A GB-BXi3-4010. That has an Intel i3 4010U CPU.

I tried everything. A completely clean install with an ISO I took from my MSDN account. It simply would. not. boot.

I tried disabling everything in the BIOS. CSM, EFI, Secure Boot, LAN, Audio, ErP, RAID/AHCI. Everything.

I removed the WiFi card, I removed the drive I wanted to install it to….Nothing.

I tried installing 8.1 and doing an Upgrade. That would fail with “The installation failed in the SAFE_OS phase with an error during BOOT operation 0xC1900101 – 0x20017”. There were no logs, because apparently this is too early in the boot process.

I tried using NTLite to open up boot.wim and install.wim to insert all the latest drivers and tell the install to HALT on any BSODs….but still nothing…just a boot loop.

A bunch of people complaining about their PCs going into a boot loop because of KB3064209.

KB3064209 …is an Intel CPU microcode update. It updates the file C:\Windows\system32\mcupdate_genuineintel.dll. This file runs at boot to update the microcode on your CPU to the latest before Windows fully initializes (I think).

This was released in June 2015. This explains why Windows 10 builds BEFORE this date are unaffected and those after, boot loop.

I went ahead and took my USB drive, copied the contents of the Windows 10 10240 ISO to it…then I tried editing the WIM files to remove the mcupdate_genuineintel.dll. It <Removed Profanity> works.

A brief overview of how to get this working:

Assume your USB drive is X: and your OS drive is C: and your user profile name is “User”

a) Copy the contents of the Windows 10 ISO to a USB stick X:

b) Open up an elevated command prompt (cmd)

c) Create a temporary folder on your Desktop (C:\Users\User\Desktop), call it “mount”

d) Mount and edit a WIM (Image file: boot.wim, Index 1):

d-1) dism /Mount-Image /ImageFile:X:\sources\boot.wim /index:1 /MountDir:C:\Users\User\Desktop\mount

d-2) In Windows Explorer, browse to  C:\Users\User\Desktop\mount\Windows\System32\mcupdate_GenuineIntel.dll and Right-click > Properties

d-3) Click “Security” Tab, Advanced, then “Change” the Owner to your own user account. Click OK, OK again.

d-4) On the Security tab, Click “Edit” then “Add” and add your user account with Full Control checked. Click OK back to Windows Explorer.

d-5) Now, delete mcupdate_GenuineIntel.dll

d-6) Close off all Explorer Windows, go back to DISM and unmount the image with: dism /Unmount-Image /MountDir:C:\Users\User\Desktop\mount /commit

e) Now, you have to repeat D1 through 6 for:

boot.wim with /index:2 (WinPE Environment)

install.wim /index:1 (Windows install, Pro/Enterprise I think)

install.wim /index:2 (Another Windows install, might be a different edition: e.g. Home on a Pro/Home ISO)

FYI: boot.wim with /index:1 (Recovery Environment)

f) Remove USB and boot the installer. Delete the mount folder on your Desktop.

This is ridiculous. How did this even get through? It is completely preventing some CPUs from installing Windows 10.

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