Windows 10 PC Will Not Boot

For the past few weeks, I have been trying to install the latest windows security update onto my custom built PC. Every time I tried to update it would reach a certain point and then give me the error message "Unable to Complete Update, Undoing Changes" ( or whatever it says there). It gave me no information as to why it failed every time, but I got tired of having to restart my computer all of the time so I began actively trying to solve the problem.

First thing I tried:
Downloaded the standalone installer, ensured that my internet was not set to metered connection (since that can prevent some updates from installing) and tried again. Same thing, update failed.

I ran the Windows Update Troubleshooter. It found a few errors and fixed all of them but one. I don't remember precisely what the error was, but I was something security related. After going through the list on the Microsoft website ( ) and made it through to option 4. When I tried to run the sfc /scannow command, it told me that the scan could not be completed. For me, the next logical step was to reboot into safe mode and try to run the scan there.

I went in and set my computer to boot in safe mode, then restarted my computer. I got to the screen with the blue windows icon and that's where it stayed. I used the restart button on my computer and it brought me to the advanced startup page after displaying the logo screen with text at the bottom saying "Diagnosing Your P.C."

Things I have tried and what the result was:

Restart: Freezes at the Windows icon screen

Continue and Exit to Windows 10: Freezes at the Windows icon screen

System Image Recovery: Windows can not find a system image on this computer. (I have never created one)

Startup Repair: "Checking disk for errors..." "Attempting repairs" "Startup Repair couldn't repair your PC. Press 'Advanced Options' to try other options to repair your PC or 'Shut Down' to turn off your PC. Log file: E:\Windows\System32\Logfiles\Srt\SrtTrail.txt"

Command Prompt (from advanced options): sfc /scannow yielded the same result, not sure what else to try.

Go back to the previous build: "We ran into a problem and won't be able to take you back to the previous bud. Try resetting your current build instead."

Enable debugging: Stuck at Windows icon.

Any version of Safe Mode from the Startup Settings: Stuck at Windows icon

Clear CMOS and try everything again: no change

Disable overclocking and try everything again: no change

Switch to Bios B (dual boot) because why not and try everything again: no change

Reseat ram: no change

I would re-install windows, but there are a few things that I do not want to lose (mainly game files in things I've been working on for years) that I fear will be lost when the operating system is uninstalled.

Here's my build:

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Windows 10 PC Will Not Boot - Recovered New

learn how to use and install windows in PC's or desktop.
Step 1: Purchase Windows
Parallels Desktop for Mac does not include Microsoft Windows. If you don’t have a Windows copy, you can purchase Windows 10 from the Microsoft Online Store:
Buy Windows 10 Home
Buy Windows 10 Pro
Note: visit this page if you need help to choose Windows 10 edition: Home or Pro.
After the purchase please visit the Download Windows 10 page to create your own installation media and the Windows 10 page to learn more about upgrade from previous Windows versions.
For earlier versions of Windows, please refer to retail stores or authorized online resellers, including
Step 2: Create a new virtual machine
In the Applications folder open Parallels Desktop and choose File > New.
Click Install Windows or another OS from DVD or image file, then click Continue.
Step 3: Select the installation media
You may install Windows from a DVD or an .iso disc image, or a bootable USB drive.
Important: Windows installation files with an .exe extension can be used only to upgrade an existing Windows virtual machine (VM). If you are performing a new install to create a new Windows VM, the .exe installation file will not work. Please contact a retailer to request either a physical disc or an .iso image.
Parallels Wizard will detect the installation media automatically for installing Windows.

You can also switch to manual mode and choose the source for Windows installation.

Step 4: Enter your Windows product key
Click Continue. In the Windows Product Key window, leave Express installation selected.

Note: If you uncheck Express installation, you will need to install Parallels Tools manually after the Windows installation.
When you are ready, click Continue.
Step 5: Select how you want to use Windows
Select how you want to use Windows in Parallels Desktop for Mac:
Games only
And in Parallels Desktop for Mac Pro and Business Edition:
Software development
Software testing
To learn more about virtual machine profiles, visit KB 123878.
Step 6: Specify a name and location
Name: You may specify a name for your virtual machine.
Location: The default location for Parallels Desktop virtual machines is /Users/username/Documents/Parallels.
If you want other user accounts on your Mac to have access to this installation of Windows, select "Share with other users of this Mac".
If you want to change your default virtual machine settings select Customize settings before installation. These settings can also be changed easily after installation.

Step 7: Begin the installation
Click Continue and Windows installation will begin. Once Windows is installed, launch it by opening a Windows application or by clicking the Power button in the Parallels Virtual Machines list.
Important: The first time you start Windows, Parallels Tools will be installed to allow seamless operation between Windows and OS X. Please do not cancel or stop the installation process. Once the Parallels Tools are installed, you will be prompted to restart Windows.
If you have any problems installing Windows from a DVD, or if you don't have a DVD drive, you can use another drive to create an .iso image and install from that. For instructions, see KB 4917: How to create an .iso image from a Windows installation DVD.

Link removed by moderator.

Post was last edited on April 17, 2017 7:11 AM PDT

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I'm very sorry but I don't understand the relevance of your comment. I am trying to get my Windows 10 PC to boot after I had an error with the OS, not run Windows on a Mac, which is what it seems your reply is about unless I am misinterpreting it.

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See If You Can Run Chkdsk Like This...

It seems as though the Windows 10 "upgrade" process may not install all the files correctly, or maybe they're damaged, or maybe something else, but running Chkdsk has fixed quite a few of these minor glitches. Try running Chkdsk in "repair" mode to find any damaged files and correct them. If you can boot to an admin account in either normal Windows or Safe Mode, start by opening a command prompt as an admin. RIGHT click on the Start button, choose "Command Prompt (Admin). Once there, type chkdsk /f /r /x, leaving the appropriate spaces between the letters as shown, then press the Enter key. You should see a note that it can't be run till a restart is done, type "Y" for yes, then press the Enter key again. Close the command prompt and restart the computer. Chkdsk will run upon restart and will take quite a while to finish.. Don't panic when the progress bar stays at 10% for a long time. It's fairly normal and the Chkdsk process may take a couple of hours.

When it's finished, it will boot to your normal startup/lock screen and you can login normally and then see if things are working correctly again.

If you're unable to run Chkdsk, then it sounds like you've got some serious problems with either the hard drive or the Windows installation. As such, I don't think you have any options as to wiping the drive and reinstalling everything from scratch. It's what I would do.

Hope this helps.


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Didn't work

I tried running a Chkdsk before I had the boot problems. I don't recall the results. I'll try running it from the Advanced Startup CMD. As it stands I can not boot the system at all. It freezes at the blue windows logo screen.

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Just thoughts on that build.

1. Leave out the XONAR for now.
2. Be sure the motherboard bios is current and reset it to defaults before you start.
3. Start with blank drives. Do not partition or format prior to OS installs.

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I didn't end up getting the sounds card since there was one integrated into the motherboard. BIOS was up to date last time I checked, and I know, OS install went well back when I did it. I've been running this build for a little over a year.

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So why the new install?

Did W10 start BSODing? It's often a sign of hardware issues which a fresh install will just tank.

Tell more. And since overclocking can damage parts, be prepared for the worst.

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No new install

There was no new install. I was just updating it and the update wouldn't install.

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Here's a few common things. Might be repeats.

1. The update is incompatible. I scanned this thread and can't find which update failed.


2. Antivirus suites can interfere along with low disk space, trojans and more.

3. One annoying update turned out to be for Office. The client never installed office so it was a mystery why it even tried.

4. Failing hard drives do this too. I've lost count how many times I clone the drive, the repair then works.

5. Changed BIOS settings. Another irritation. Clients change the BIOS here or there and boot problems follow. Some are severe enough to damage the file system to the point it's a wipe and start over.

Tell more about this update.

Post was last edited on April 17, 2017 10:07 PM PDT

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Problem Is Not The Update

Please read the original post in its entirety. I attempted to install an update which continually failed. I ran through standard procedures and when my sfc scan failed I tried booting into safe mode. This boot failed and froze at the Windows icon. I no longer have access to my computer as it will not boot. I have listed everything I have tried, and what the response from the computer was. I am no longer worried about the update, but rather the fact that I can no longer use my computer.

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RE: stuck at Windows logo

I'm afraid it's really time to reinstall Windows.

To be sure you don't lose any data you forgot to backup, either do it on a new hard disk (and later get that data from the old disk) or first boot into a Linux disc or stick (free to make) to copy it to a USB-stick or external hard disk.

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Message Title

I was afraid of that, but based on any other reading I've done you seem to be right. I was really hoping somebody on here would happen to have a totally out there solution that would solve my problems, but alas, it appears that there is no easy solution.

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Sorry I didn't get that.

It's a long thread so I had the impression it was something else.

As I don't know what update you tried to install plus how and why I'm stuck with you trying a Windows 10 Refresh. If that fails, you get you do the Windows 10 Reset (which wipes all files except for what you backup.)

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It's Alright

It is a long post, I just tried to include as much info as possible. It was just the most recent security update. The refresh also failed, so it seems like a Windows 10 Reset is my only option. Thank you anyways!!

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When refresh fails. READ ME!!!!

The only time that happens here is when there is something hardware or deep OS damage going on.

READ ME!!! I am sorry I didn't seem to mention a big thing I found. It's kinda simple and exasperating once you know about it. Ready? UNPLUG ALL USB THINGS and boot up. Wait for Windows to finish, disk activity to slow and then log in. This has fixed a few odd update failures. I can guess why but have yet to find a Microsoft answer.

Good luck.

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Link about refresh and reset.

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