[SOLVED] Windows failed to start

[Owldude]

Alright, so this began recently. I was doing some home work nothing unusual, then out of nowhere, bluescreen. I waited patiently for my PC to reboot, but when it did a screen saying "Windows failed to start" and an error 0xc00000f. I looked up for a solution and found something saying restart the PC and go into safe mode by spamming F8. Did that but it didn't work so I looked which keys do what on the startup screen of my motherboard. Went into boot mode, couldn't do much, pressed esc, and et voila. For some reason it started properly yet every time I start up my PC I have to do that. So my question is could a cmd program like /fixmbr work, or do I get a fresh install of windows? Also could matters get worse?
PC specs just in case:
mobo: GIGABYTE H370 HD3
CPU: i5-9400F
GPU: GTX 1060 Palit Dual 6GB
PSU: CoolerMaster B500 V2
RAM: TEAM ELITE 2x8GB DDR4 2666 MHz
SSD: XPG SX950U 2.5 960GB
SSD 2: XPG GAMMIX S11 Pro 256GB (Windows is installed on this one if that matters)

Any help is appreciated!

 

[Colif]

0xc00000f.

is an error in the boot config data

F8 only gets you into safe mode if its been previously set up. Its off by default in win 10 for security reasons.

fixing mbr should fix it. Follow this: https://www.lifewire.com/how-to-rebuild-the-bcd-in-windows-2624508

 

[MJS WARLORD]

Hi colif i never knew safe mode was off by default , how do you activate it.

 

[Colif]

Using F8 to get into safe mode is off by default for security reasons
Safe mode itself is on, but you need to be able to get to the logon screen normally to access it.

If you really need F8 way and its not set up before hand there is this
Here is another way to try to get to Safe Mode.

Boot to the Command Prompt of your boot disk (see methods to create below). Enter these BOLD commands and press ENTER after each.

(Note the colon after C with no space; then the spaces which are important - one after T before / & T before { & } before B & Y before L)

C:

BCDEDIT /SET {DEFAULT} BOOTMENUPOLICY LEGACY

EXIT

You are back to the boot screen -> Shutdown the computer.

Boot back up and "immediately" start tapping F8 (That means power button - then F8).

Hopefully that should get you into Safe Mode.

--------------------------------------------------------------------------------------

To reverse that you can use the same steps and type these (again note spaces)

C:

BCDEDIT /SET {DEFAULT} BOOTMENUPOLICY STANDARD

Restart but F8 will not work now.

 

[Rickbale]

Alright, so this began recently. I was doing some home work nothing unusual, then out of nowhere, bluescreen. I waited patiently for my PC to reboot, but when it did a screen saying "Windows failed to start" and an error 0xc00000f. I looked up for a solution and found something saying restart the PC and go into safe mode by spamming F8. Did that but it didn't work so I looked which keys do what on the startup screen of my motherboard. Went into boot mode, couldn't do much, pressed esc, and et voila. For some reason it started properly yet every time I start up my PC I have to do that. So my question is could a cmd program like /fixmbr work, or do I get a fresh install of windows? Also could matters get worse?
PC specs just in case:
mobo: GIGABYTE H370 HD3
CPU: i5-9400F
GPU: GTX 1060 Palit Dual 6GB
PSU: CoolerMaster B500 V2
RAM: TEAM ELITE 2x8GB DDR4 2666 MHz
SSD: XPG SX950U 2.5 960GB
SSD 2: XPG GAMMIX S11 Pro 256GB (Windows is installed on this one if that matters)

Any help is appreciated!

Methods To Fix The 0xc000000f Error In Windows
To fix this irritating error while booting your Windows computer, here are a few things you can do:

1. Use Windows Startup Repair To Repair BOOTMGR
Before using this method, you need to have a Windows Setup DVD or Bootable USB Installation ready. In case you don’t have, read this article to learn how to download a Windows installation file and make one.

The Startup Repair in Windows Installation tool can help you to scan for corrupted or missing system files on your computer, and then replace them if needed. It’s a good way to repair the BCD data file in case it’s damaged or missing.

To use this feature, follow the instructions below:

Firstly, insert your Windows Setup disc into CD/DVD reader and then reboot your computer.

• Select to boot from that Windows Setup disc. If you use a bootable USB flash drive, then choose to boot from USB instead of the CD/DVD reader.
• When you see the “Press any key to boot from CD or DVD” message on your screen, just press any key, for example: Enter, or Space.
• When the Windows Setup is loaded, click on the “Next” button to get started.
• In the next step, choose “Repair your computer” instead of clicking on the “Install now” button.

2. Manually Rebuild The BCD Data File
Besides using Startup Repair feature in the Setup disc to correct the error, you can also rebuild the BCD data file manually.

To do so, follow the same instructions above to boot into Windows Setup, and then select Command Prompt from the options.

In the next step, execute the following command to rebuild the BCD on your computer.

bootrec /rebuildbcd

It will automatically scan for Windows installation and rebuild the BCD data file.

After that, reboot your computer and see if it’s able to boot up successfully.


Regards,
Rick Bale

 

[Owldude]

Thank you to both Colif and Rickbale!
For the time being I don't have an available USB that has 8GB of free space, therefore I will update you guys when buy one.
Here's to hoping this works!

P.S I just wanna point out that my computer still functions just as expected after I press F12 a couple of times as it boots, and then when I close the BIOS menu (at least that's what I think it is called) everything boots up just like it does any other day.

 

[Owldude]

So I got the USB and tried both of these methods and it changed nothing. I got "
Total identified Windows installations: 0" when I tried the bootrec /rebuildbcd command. PC still works only after I go into the boot menu and exit out.

 

[jerry_maguire]

Try to reboot it again after some time.

• Power on and off your computer three times
• On the third time, your computer will boot into the Advanced Recovery environment
• Click on Advanced Options
• Click on Troubleshoot
• Click on Advanced Options
• Click on System Restore, see if you can go back to an earlier time.

If not, boot into the recovery environment again, then try a startup repair.
If that does not work.
Go to a working computer, download, create a bootable copy, then perform a clean install.

Let me know if this helps.
Regards,
Jerry.