How to Repair or Repair Windows 10 Startup ≫ Tutorial

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Although Windows is one of the most efficient, robust and secure operating systems today available , it is not without startup or other problems. One of them is when you turn on your PC and you realize that Windows won't boot and the dreaded blue screen appears. These types of inconveniences are common, the problem is that it is due to many reasons, which do not have an easy solution.

In these situations, it is difficult to find the origin of these inconveniences, since the causes that occur can be multiple and be caused by various factors. If this is your case and you don't know how to fix or repair windows 10 boot , do not worry. Here you have all the possible solutions to this problem step by step.



From safe mode

The first thing to do when Windows startup fails is to try log into the system via safe mode . This mode is a boot pattern that Windows brings to boot a system in an alternative way, so that it boots with essential software and thus is able to avoid possible errors.

If you can enter Windows Safe Mode, the options to restore it increase. This is because you have access the command prompt console (CMD) and then you start with a disk error check. To begin with, you will check that the hard drive has not been damaged.

The way you enter Safe Mode when Windows won't start is automatically, you just have to reboot the system 3 times and it will enter safe mode. All of this as part of the Windows recovery process. Force Safe Mode by resetting the system 3 times when the system tries to boot.



  1. In recovery mode, click on the option " Troubleshooting ".
  2. Then, click on the " Advanced options ".
  3. Finally, click on the option " Startup Repair ".
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The system will start at make an analysis of the possible errors it has and will proceed to resolve them . You just have to wait a bit because if the problem is severe, Windows will remove the errors and restore the files that were affected.

Desactivar Fast Boot

Most modern PCs have an option within the BIOS or UEFI called Fast Boot. This option allows Windows 10 to boot quickly by preloading the drivers first. The problem arises when Windows updates are installed that can compromise the functioning of Fast Boot and therefore the PC cannot start Windos correctly when it starts with outdated drivers.

To disable it, you just have to enter your computer's BIOS or UEFI . Remember that each manufacturer configures access via different keys, so they can be: F1, F2, F10 or DEL. Once your PC restarts, press the corresponding key with your motherboard and you will be in the BIOS. You just have to go to the Boot or Boot section and disable the Fast Boot or Fast Boot option.

Finally, you just have to save changes and exit BIOS or UEFI , your computer will automatically restart and enter Windows normally if Fast Boot was what caused the Windows 10 boot problem.


From the installation media

This method is used when the error is severe, to the point where it is not possible to enter Safe Mode with automatic recovery media. Fortunately, you just have to have a Windows 10 installation CD or if not, have an ISO image of it from external storage media, such as a USB drive. It's best to create a boot drive, just in case things get worse and Windows 10 needs to be reinstalled.


  1. Now, what you need to do is connect the unit to the corresponding port or insert the Windows 10 CD and turn on the computer.
  2. Remember it has to be booted from the boot drive or CD , then configure boot from your PC's BIOS.
  3. Once these settings are made, your computer will restart and boot from the drive, where the main Windows 10 installation screen will appear. When it appears, click the "button" Repair your computer ", which is at the bottom left of the screen.
  4. As you will see, the procedure to follow is similar to the automatic recovery mode, only this time you will have to click on the option " Command Prompt ".
  5. The command console and when it does, type the following command: BOOTREC / FixMbr. This command writes the master boot record to the disk partition where the boot is recorded.
  6. If the above command doesn't work, è necessary write a new boot sector to the partition , using the following command: BOOTREC / FixBoot.
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Finally, you just need to restart your PC for the changes to take effect and Windows starts normally , all this if the problems are caused by a bad reading in the boot sectors.


Drive letter reassignment

Windows 10 updates can become problematic, because the source of all problems can be due to this. If there are multiple hard drives, it can happen that drive assignments have been configured incorrectly thanks to some updates. To fix this, you just need to boot into safe mode with recovery options. Follow these steps to assign your drive letters:


  1. Instead of starting a self-test, click on " Command Prompt "The CMD will appear where you will need to enter some commands.
  2. Now digita diskpart in the console.
  3. After run the previous command , type the command: list volume. This is so that you can see which drives your system has and which letters are assigned to them.
  4. If something is wrong, you just have to type: select the volume, followed by the number of the volume or disk you want to change.
  5. Then type the following command: assign letter, followed by the volume or disk letter you want to assign. Usually, the letter C is assigned to the primary hard drive, where Windows 10 is installed.

Finally, don't you just have to restart your PC and if all went well, Windows will load normally and you will log into your desktop environment.

Disconnect USB devices

Ironically, many times Windows 10 won't start because cannot load drivers for these devices, as it does not detect them. In these cases what should be done is; unplug them all and start Windows so it loads the drivers it has by default and then log into your environment normally. Many of these problems with USB devices can also be due to Fast Boot being enabled, and the treatment of this problem has already been discussed earlier in this article.

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