One of the most terrible user errors is the one that appears when you turn on the computer and tells us, on the BIOS black screen, that "". When this message appears, our system will not be able to boot, and the only way out is to restart the computer by pressing "ctrl + alt + del", and in doing so, you will most likely see this message again An operating system wasn't found. Ttry disconnecting any drives that don't contain an operating system. Press Ctrl+Alt+Del to restart.

The problem of the error is that the operating system is not displayed and therefore the BIOS cannot boot the Windows system. The reasons for this error to appear are very diverse, from a simple configuration error in the BIOS to a more serious problem that, in the worst case, forces us to completely format the computer. Therefore, we will analyze the main causes and their solutions to eliminate the error "" ( An operating system wasn't found).

Disconnecting external USB devices from the computer

If your computer has multiple internal hard drives, external drives, and USB sticks connected, it is likely that The BIOS is trying to find the operating system in the wrong place. Therefore, not finding the Windows system, it gives the error "No operating system found".

• To solve this problem, you need to disconnect all external storage devices connected to the USB ports and try again. We can also check our optical drive to make sure it's not trying to load the wrong DVD.

If after doing this the problem is still not resolved, the next step is to go into the BIOS setup.

Changing BIOS Boot Priority

Enter the BIOS configuration by pressing the F2, F12 or Delete buttons. After that go to the configuration section Boot and put in the first place in the column priority a hard drive that contains the working and primary Windows operating system. In different BIOS versions, it is called differently, but you are looking for a word with a combination of Priority, which means "priority boot". Here are some names from different BIOSes: Hard Disk Priority, Boot Device Priority, Hard Disk Boot Priority.

May be useful:. There you will find roughly where to look. priority, but don't forget that there's a manual for the flash drive.

After you have set the boot priority from the hard drive where your system is located, do not forget to save the settings with the F10 button and restart the computer to make sure "whether the system was found when the computer was turned on."

Enable or disable Secure Boot

If you are using a modern computer with an operating system such as Windows 8 or Windows 10, then perhaps the reason why our Windows does not start is in the wrong UEFI secure boot setup.

Go back to BIOS, find the configuration section secure boot(Secure Boot) and deactivate it, or activate it if it is disabled, to check if the error "Operating system not found when booting the computer" is gone.

In different versions of the BIOS or UEFI, the location of the settings looks different, but in any BIOS version, look for the column secure boot try turning it off or on.

Reset BIOS to factory settings

At the bottom of the BIOS menu, you will see a key to default settings or BIOS reset. On my car it is F9. Confirm your decision when prompted and restart your computer.

If you did not find an approximate button, like F9 to reset the settings to factory settings, then look for the line Load Setup Default and reset BIOS.

If your operating system hard drive is placed first, but the computer still won't boot, it's possible that some of the initial sectors of the drive have been corrupted, such as master boot record(MBR) DOS boot record(DBR) , or Boot configuration database(BCD).

The repair of these sectors is quite simple. All we need is to start the computer from the Windows USB or DVD. You can, for example, or just start with and select "system restore" when installing windows.

Enter the following commands in CMD in order by pressing enter. Each command may take time to complete.

• bootrec.exe /fixmbr
• bootrec.exe /fixboot
• bootrec.exe /rebuildbcd

Activate the Windows Partition

It is possible that the partition where Windows is installed is disabled. You can fix this using Windows' native diskpart tool. To complete the following steps, you will again need a USB flash drive to install Windows. Launch the command prompt as described above via the recovery disk or the Windows installation flash drive and type the following commands at the command prompt:

• diskpart- Launching the tool.
• list disk- List of connected disks to the computer.
• select disk 0- Select the hard disk on which you want to activate the partition. In my case, the primary hard drive is 0.
• list volume- Shows the partitions on the selected hard drive.
• select volume 2- Select a local drive to activate. Choose the one where the widows system itself is installed.
• active- Activate section.

Restart your computer and check if the error is gone when you turn on your computer An operating system wasn't found. Ttry disconnecting any drives that don't contain an operating system. Press Ctrl+Alt+Del to restart, which means operating system not found, click to reload ctrl+alt+del.

Probably, there is no need to explain how unflattering the situation is when a user turns on a computer or laptop to boot and instead of the usual start, the system writes Operating System not found on the screen for no reason at all. For many users, this is a real shock. How so? Yesterday, everything worked… What could have happened, and how to fix this situation, we'll see now.

What does the Operating System not found error mean?

If you look at the message itself, it's not hard to translate it as "operating system not found". But here's the problem - the user is absolutely sure that it exists. But the computer system does not share such confidence with the user, because it simply does not find the components responsible for loading the system.

In general, such situations most often appear, for example, when a user removes a hard drive and replaces it with a new one. Maybe just the hard drive is out of order, but you never know what.

Possible causes

If such an incident suddenly turned out, and the system constantly displays the message Operating System not found (Windows 7, 8, etc.), first of all, do not panic. To get started, just check if a flash drive is inserted into the computer or laptop, and in the BIOS settings, the USB device is the priority for booting.

If the hard drive was removed or changed to a new one (this applies to stationary computers), it may very well be that when it was reconnected, the corresponding cables were connected incorrectly or loosely. Let's see what can be done in such a situation.

Basic BIOS settings

The easiest way to change the BIOS settings can be to reset all settings to the factory defaults (Default). Every BIOS version has this setting.

In extreme cases, you can simply change the boot priority in the Boot Device Priority or Boot Sequence section, and install the hard drive as the first (main) boot device (boot device).

It happens, however, that the hard drive is detected in the BIOS, but it still does not boot, and the system again and again gives the warning Operating System not found. What to do in such a situation? First, see if it’s in front of the hard drive model. It signals that the device in the system, although it is present, is simply disabled or not used.

As a rule, in most versions of the BIOS on the right there is a special help field for the device (Specific Item Help), which contains a keyboard shortcut that allows you to enable or disable any component. The most likely combination is Shift + 1. But here everything depends on the manufacturer (combinations may be different).

Switching hard drive operating modes in BIOS UEFI

On the other hand, if an Operating System not found warning appears on a laptop, where it is quite problematic to remove the hard drive, you should separately pay attention to the settings of the hard drive operating modes. As an example, consider the settings of the latest UEFI system, although they can be used without problems in other versions.

In general, there are two main modes in the SATA configuration: AHCI and IDE. During the initial installation of the OS, as well as in the default settings, AHCI mode is enabled. When you switch to the IDE, no matter how you try, you won't be able to install Windows on the hard drive.

The same applies to the moments when users, at the end of the installation process, either out of ignorance or accidentally turn on the IDE mode. As it is already clear, the system issues the line Operating System not found. By the way, even if you put another fully functional “screw” at the moment, it will also not work without changing the SATA settings to the initial ones.

Therefore, it is immediately worth advising users to change such settings only as a last resort, when it is really necessary.

Restoring the Windows bootloader

There are also cases when the message “Operating System not found” appears when the Windows bootloader is damaged, which is associated only with errors on the hard disk, for example, due to incorrect shutdown. In this case, as is already clear, the entire system can “fly off”.

In such a situation, you can try to restore the bootloader, and at the same time check the system disk or partition for errors. To do this, it is always desirable to have the original installation disk or a system recovery disk at hand.

Here you will need to set the optical drive in the BIOS as the first priority boot device, and then use it. Note that in this option there is no question of restoring Windows from a checkpoint. This still won't help and the Operating System not found warning will reappear.

Here you need to use boot recovery mode or command line, which is preferable. In it, you need to sequentially enter two main commands: bootrec.exe /FixMbr and bootrec.exe /FixBoot, after each pressing "Enter". If such a sequence does not help, in addition, you can add the bootrec.exe /RebuildBcd command.

Before performing such actions, it is strongly recommended to check for errors with their automatic correction (commands chkdsk / f / r or chkdsk / f / x / r). You can also use the chkntfs /x c: checker if you have an NTFS file system on your system partition (drive C).

If nothing helped

However, if all the above methods of correcting the situation do not help, then you should definitely diagnose the hard drive. But if it’s not a problem to remove it, then with a laptop you will have to contact the nearest service center or workshop and not try to remove it yourself.

As it is already clear, if the hard drive “fell down”, there’s nothing to be done, you will have to change it to a new “hardware”, and then install the “OS” again. You can, of course, try out the action of the utility on it, but it is quite difficult to guarantee one hundred percent success.

operating system not found

Everyone knows that the operating system is mostly located on the hard drive or on the SSD. And when people see this error on the screen, the first thought that comes to mind is that it is the hard drive that is faulty or damaged.
In most cases, this is true, although there are exceptions. The boot volume of your operating system may be corrupted;

And after these two possible reasons, then comes the possibility of your hard drive to become a little faulty, and I think you will fix it too;

operating system not found error what to do?

Actually it's a mistake BIOS and it can occur on any computer or laptop. It doesn't matter what operating system is installed, this error can occur both on Windows 10 , so on ubuntu.

BIOS is responsible for starting your computer, including starting the operating system. By showing the error message "Operating system not found" on system startup, your BIOS is trying to say that something is preventing the operating system from loading while the computer is starting up.

Possible causes of operating system not found dell:

As it was said an operating system wasn't found can occur on any computer or laptop, regardless of whether you are using a laptop Sony VAIO or computer Dell. Some possible causes for the error:

• The computer's boot volume is corrupted.
• The BIOS needs a reboot.
• The computer's internal hard drive cable is damaged.

Methods for fixing the error error 1962 no operating system found:

The best way to identify the problem is to check the status of the hard drive or SSD-connections in BIOS. This will help determine if your hard drive is connected correctly or not.

To check the status, just open BIOS your computer at startup and find the system information in the menu BIOS.

Condition #1: What to do if your hard drive is listed in the BIOS?

If this is the case, then it is quite possible that some external storage device or maybe the boot volume of your hard drive is creating some kind of problem with BIOS.

So how to fix it:

Method 1- Disconnect all external storage devices if they are connected, and then restart the computer. If the error does not appear, some of your external USB create a problem. If it still remains, try the next method.

Way 3 Use the startup repair tool as it will repair the Windows boot volume. These links will help you with this. >>
>>

If nothing can, I'm afraid I'll have to reinstall the operating system.

Condition #2: What to do if your hard drive is not listed in the BIOS?

If your hard drive is not listed in the BIOS, then it is quite possible that this issue could be due to a faulty HDD/SSD;

So let's see what we can do here:

Replace cable sata. In most cases, this little thing can save you a lot of money before you go shopping for a new hard drive for your computer; Open your desktop computer case and check the cable SATA for visible damage. I'm talking about a desktop because laptops simply don't have this cable. Data is transmitted through this cable, so damage to it means that the hard drive cannot be used for your computer. A SATA cable is much cheaper than a new hard drive, and I advise you to buy a new cable first and test your system with it.

If replacing the cable does not solve the problem, or operating system not found on a laptop, then I have to disappoint you. Most likely your hard drive is bad.
Not everything is so bad. In most cases, the data on the drive can be recovered. In any case, you need to take the hard drive to a specialist.

In contact with

Hello dear friends! The next time you start the computer, an error appears on the monitor with the name "Operating system not found". Instead of loading Windows, a message is displayed on the screen, which, translated from English into Russian, means that the system was not found.

For many, such a mistake causes negative emotions, but everything is not as scary as it seems at first glance. Let's consider in order what this error is, why it appears and how to fix it on our own, without seeking help from qualified specialists.

Error "Operating system not found" - what does it mean?

"Operating system not found" - what could it mean? After all, Windows is installed on the computer, and before that it started without problems. Such an error usually occurs after the user has manipulated the hard drive, for example, changing it to another or a new one. If the user did nothing of the kind, then the reason may be hiding in the failure of the hard drive or a problem with the cable connection.

The second likely cause of the error is incorrect BIOS settings.

Most often, as an incorrect setting of BIOS settings, the location of the HDD or hard drive is not in the first, but in the second place. Initially, you need to make sure that the cable is connected to the hard drive, and only after that you need to go to BIOS to check that the hard drive is in the first place to start.

Check if the USB flash drive with which the computer is trying to start is inserted into the computer. The error message occurs on various versions of the Windows XP, 7, 8, 8.1 and 10 operating systems. If the problem occurs on a laptop, then the probability of a hard drive failure is 90%. To try to eliminate the error, you need to do a number of some manipulations. Why try? Because at the same time we will look for the cause and try to fix it, unless of course the whole point is not the failure of the hard drive.

I How can I fix the "Operating system not found" error?

If the system unit has been checked for defects with the hard drive connected, then turn on the computer and boot the BIOS system. It is necessary to check whether the parameters in the BIOS are set correctly, and if not, then it is enough to change them to return the computer to working capacity.

To get into the BIOS, you need to press the F2 or F12 key while starting your computer or laptop. After the blue screen appears, where everything is written in English (this is the configuration of the Bios shell), you need to go to the Boot section using the arrows on the keyboard.

It is interesting! For those who have never been in the BIOS system, it will be useful to know that this shell is controlled only using the keyboard, and the mouse is inactive here, but in the new version of the OS, the mouse is just the same active (an example on the new one will be considered below). BIOS version).

After going to the Boot section (on some versions of Advanced), a list of devices connected to the computer will appear. The name of the hard drive should come first. If so, then the cause of the malfunction is not in the BIOS configuration. If the hard drive is in the second or other places, then the problem is found. You can fix it in the following way:

1) Highlight the name of the hard drive in white using the up/down arrows.

2) Press Enter, then move the hard drive to the first place.

3) Save your settings.

Now you can exit the BIOS section and load Windows. It is in 100% of cases necessarily loaded after performing the above steps.

II Reset BIOS settings

If after entering the BIOS, in the Boot section, the hard drive is placed in the first place, then you can solve the problem by resetting the settings to the factory settings. In any version of the Bios shell, there are such settings that can be implemented in different ways. Let's consider one of them:

- Open the Exit section.

- We find the item LoadSetupDefaults in it.

Save the steps, after which you can leave the BIOS shell and start Windows.

After doing these actions, the computer will return to the factory settings. If the problem was software, and Windows did not boot precisely because of it, then a factory reset will help resolve the problem. If not, then we move on to the implementation of another method.

III Switching the operating mode of the hard drive

If the “Operating system not found” error appears on a laptop where access to the hard drive is limited or difficult, then you will need to view the settings for the hard drive operating modes. There are two modes in SATA configuration - AHCI and IDE. When you first install the OS and the default mode is AHCI. If you switch the mode to IDE, then you will not be able to install Windows on your computer.

If, after installing the operating system, users experiment with the BIOS shell, and accidentally change instead of AHCI to IDE mode, then the OS will not start after making such changes. At startup, the error “Operating system not found” will appear on the monitor. If such actions are appropriate, then you need to change the settings, and then restart Windows.

IV Recovery MBR hard drive

Another reason for the formation of the “Operating system not found” error may be a violation of the integrity of the sectors of the hard disk. You can fix the error by repairing sectors. You can do this yourself using a USB flash drive or boot disk. I suggest you consider this using the tenth version of Windows as an example.

The instructions for recovering hard disk sectors look like this:

After starting from a USB flash drive or disk, you need to select the "System Restore" item.

Follow the path: Troubleshooting - Advanced Options - Command Prompt.

After that, you need to enter three commands in order, which are described below:

bootrec.exe /fixmbr

bootrec.exe /fixboot

bootrec.exe /rebuildbdc

Close the command prompt, and restart the computer, only from the hard drive. The problem will be fixed if the cause is damage to the sectors of the hard drive on which Windows is written.

So, summing up today's release, which involves fixing the "Operating system not found" error on your own, you will need to carry out the following manipulations:

- Check the BIOS settings, rearrange the hard drive to the first place and, if necessary, reset the data to the factory settings.

- Check cable connections.

- If a power supply failure is detected, if it does not supply power to the hard drive, you need to replace it.

- Check the hard drive mode in the BIOS and switch it to AHCI.

- Restore damaged sectors of the hard drive.

In conclusion, I hope that today's instruction will definitely help solve the problem with the appearance of an error. If, after the above steps, the hard drive refuses to boot the OS, then you need to check it for suitability and, if necessary, replace it with a new one.

It is always frustrating when, when you turn on your computer, an error appears on a black or blue screen instead of the usual Windows desktop. In this case, users are worried about a problem on a black screen that does not allow the system to boot, or rather, the error says that there is no system at all. You can see her in this image:. It says that the operating system was not found, let's figure it out.

What to do with the error Operating system not found

Why does this problem occur? The main culprit of the problem is related to the hard drive, and for most, although rarely, the cable just moved away from the connection port on the system board or the HDD itself. The second point is that the BIOS settings are incorrect. For example, your hard drive is not in the first place, but in the last one, or some other options have been changed. Also, any faulty component, be it a power supply or something else, may be reflected in the appearance of the indicated error.

Now for the contract. Check the BIOS for incorrectly set options. On the tab Boot or Advanced make sure the hard disk drive (HDD) comes first. If this is not the case, then rearrange using the arrows or the F5 and F6 keys, depending on the BIOS version. If the settings are all correct, then just . This will not make it worse, and the error may disappear.

But what if the hard drive is not displayed at all in the BIOS? There are two options. I said at the beginning, the disk could be disconnected by an unknown force, or the cable just went away. It is necessary to completely turn off the computer and check all the wires, whether they are tightly connected. The second option is a hard drive failure. There is nothing left but to check it for performance from another PC.

When an operating system not found appears on a laptop, it is very unlikely that wires and cables will come off, since everything is tightly and compactly located there. Most likely your disk is simply defective, or there is a problem in the BIOS.

Software solutions

Above, we analyzed the physical solutions, and now let's see how this can be fixed programmatically.

Another and frequent problem is that another one could be installed on the hard disk where the operating system is installed. Or rather, try to do it. Eventually boot record the old OS was overwritten by the new one, but it so happened that not one OS is loaded and the operating system not found error appears. To fix this problem, you need to restore the Windows bootloader.

The last solution, although it does not apply to software, but finally I will write it here is the replacement of the power supply. It could be either completely faulty (although I doubt that after that the computer would start), or partially.

• Reset BIOS settings;
• Move the hard disk with the system to the first place in the list of devices;
• Check the cables and wires for connecting to the HDD, whether everything is tightly connected;
• If the drive is bad, check it out. Connect to another PC (the drive may not be detected in BIOS);
• Replacing a faulty power supply;
• Repair bootloader

Now you know about the main solutions for the operating system not found error. I indicated the necessary links, otherwise I would have to rewrite what already exists. Hope this helps you and good luck! By the way, I wrote another article. Read it, maybe the instructions from there will help you too.