Windows 10 is a very robust operating system, but nothing is foolproof. A fairly common problem is that some files responsible for system startup get corrupted, making Windows 10 unable to start up properly. In this article we explain how to repair Windows 10 startup step by step .
Repair Windows 10 startup using installation media
There are many reasons why Windows 10 boot may stop working, we put ourselves in the worst case and the operating system is unable to start at all.How do we fix it? It's very simple, we just need to create an installation media with Windows 10 Media Creation Tool, either a USB stick or a DVD. The only drawback is that for this we will need to have another PC running, or have a previously created media. Once we have the Windows 10 installation media ready, we need to use it to start the computer and load the Windows installation program. How do we do it? Put the pendrive or the DVD in your PC and turn it onYou will see a message telling you to press any key to boot from the installation media. We emphasize that this process is also valid to repair the startup of Windows 7 and Windows 8 , you can use the same Windows 10 installation medium. After a few seconds you will see that the Windows installation program starts, select the Spanish language and click in " Next ". 
A new window will appear, click on " Repair computer " to continue with the Windows 10 startup repair process. 
A window will open with several options, the one that interests us in this case is " Troubleshoot ", click on it. to select it. 
First,We will try to use the automatic repair of Windows , it is not infallible but it is capable of solving many of the most common problems that appear in this operating system, we do not lose anything by trying. To do this you just need to click on the option " Startup Repair ". 
You will get an operating system selection window, you must choose the one you want to repair, in this case only Windows 10 appears because we do not have another. 
The Windows 10 installation program will start to diagnose your PC to find the possible problem . After a few seconds it will inform you whether or not it has been able to repair the problem. In this case he has not been able, do not worry, we are smarter. Click on "Advanced options ". 
You will return to the advanced options section that we have seen before, this time click on " Command Prompt " to start a window of administrator commands. 
A cmd command window will open. To repair Windows 10 startup you must use the following command : bootrec.exe / fixmbr 
Press Enter and you will see how the process is completed after a second or two. 
Now you just have to check if the problem that prevented your Windows 10 operating system from starting has been solved. To do this, you just have to click on the upper right corner of the command window to close it . After that select the option "Turn off the computer"
Turn on the PC again and let it load the operating system from the hard disk , if everything went well you should see that Windows 10 starts without problems. With this ends our tutorial on Windows 10 boot repair, it will surely be very useful for you. remember to share the post on social networks so that you can help more users who need it.