The usual thing every time we start a new session on our Windows PC, is that we press the power button, and after a few seconds we start working. Unfortunately we occasionally run into problems here. In fact these are many times related to the Master Boot Record, also known as Windows MBR.
Of course, it is not necessary to point out that the computer suddenly does not start up, for whatever reason, this translates into a serious problem. That is why in these same lines we are going to focus on one of the most common causes in this regard. Specifically, we refer to the one that we cannot access the PC’s operating system due to a failure in the MBR or Master Boot Record. In order to better understand what we are talking about, let’s actually see what this element is that we mention here.
What is the MBR or Master Boot Record
The first thing we must take into consideration at this point is that the main boot record is also known as the Master Boot Record or MBR. Thus, this is the first sector of the storage unit that serves as the boot of the operating system itself. Say that this sector is sometimes used to boot the operating system with bootstrap, while other times it is used to store a partition table.
Likewise, this MBR is also useful when identifying an individual hard drive, although on some PCs this is not used. Keep in mind that in these times, hard drives tend to have a certain number of independent partitions. Here we can find several 3 primaries and some other extended ones. Of course, only one of these has the partition in charge of starting the entire operating system on the disk, in theory, sector zero of it.
Therefore, as you can easily imagine, if this zero sector has some kind of problem, for whatever reason, the PC will not be able to boot normally. That’s where our problems with the MBR or Master Boot Record begin. But with everything and with it, below we are going to give you a hand to solve it. With this, what we really try is that everything returns to normal on our PC.
Fix Windows boot failure due to MBR
Thus, after what we have told you, we are going to see what to do if we find a problem with the MBR of the PC that is preventing it from starting. First of all say that if we see that the computer does not start, it is easy to panic. But you don’t need to take drastic measures, because if the problem is related to this Master Boot Record, we will probably be able to fix it. As we told you, this The MBR contains information about disk partitions and how the computer should load the operating system.
It is also interesting to know that the MBR is becoming somewhat outdated and is gradually being replaced by GPT or GUID Partition Table. However, many computers continue to use the MBR for compatibility reasons. But let’s see how to fix the aforementioned MBR failure to get back to working with the PC normally.
Open Windows RE to fix the bug with the MBR
Of course, once we get down to work to solve the bug we are telling you about, the first thing we realize is that we don’t have access to Windows. Therefore, since we cannot start Windows to access the command prompt window, we will take another route. For this we can use Windows RE, that is, the recovery interface of the operating system itself. Thus, to access this that we are commenting on, the first thing to do will be to press the F5, F8 or Del key repeatedly as soon as you turn on the PC. This will give us way to a different window than the usual one, where we have the possibility of clicking on the Repair team button.
From there, in the next window that appears on the screen, we have to opt for the Troubleshoot option to access the Windows recovery interface. Thus, we are going to find several options for all this. One of them, which is precisely the one that interests us in this case, is the so-called Command Prompt.
As you can imagine, at that moment a CMD window or command prompt will open. In it we will have to execute some commands to repair the MBR that we have talked about. Say that here, as we are going to show you several commands, we can try to restart after each one and try to start normally.
Commands to fix Windows Master Boot Record
As we told you, there are several orders that we can use in this regard to solve the problem with the MBR. The first of them is the following:
Once this is completed, we will see a message on the screen that indicates it. As we told you before, now we can try to start Windows as usual. But if this command does not solve the problem, we can try the following to delete the existing MBR and create a new one:
Also, assuming none of this seems to work after trying to boot the computer, let’s try this one to repair the boot configuration data:
Assuming that we have installed several operating systems on the computer, run this command to force Windows to check them all again:
These are the commands that we can use in order to repair the Windows Master Boot Record, which should solve the problems with said MBR. Finally, we will tell you that this type of failure in particular, in many cases is usually derived from certain corrupted files. But as we have seen, the solutions for all this can be carried out in a few seconds and without the need for advanced knowledge.