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 in translation 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 us examine in order what kind of error this is, why it appears and how to fix it on our own without resorting to qualified specialists for help.

“Operating system not found” error - 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. This error usually occurs after the user has manipulated the hard drive, for example, changed it to another or new. If the user did not perform anything like this, then the reason may be hiding in the failure of the hard drive or a problem with connecting the cable.

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

Most often, as an incorrect installation of BIOS settings, the location of the HDD or hard disk 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 of launch.

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 operating systems WindowsXP, 7, 8, 8.1 and 10. If the problem arose on the laptop, then the probability of failure of the hard drive 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 thing is in the failure of the hard drive.

I How can I fix the “Operating system not found” error?

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

To get into the BIOS, you need to press the F2 or F12 key while starting up the 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, 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 will be discussed below on the new BIOS version).

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

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

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

3) Save the settings.

Now you can exit the BIOS section and download the Windows OS. It in 100% of cases is sure to load after performing the above actions.

II BIOS reset

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

- Open the Exit section.

- We find in it the item LoadSetupDefaults.

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

After doing this, the computer will return to the factory settings. If the problem was software, and Windows did not boot precisely because of it, then resetting to factory settings will help to resolve the problem. If not, then proceed 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 look at the settings of the hard drive's operating modes. SATA configuration has two modes - AHCI and IDE. At the first installation of the OS, the default mode is AHCI. If you switch the mode to IDE, then install Windows on a computer will not work.

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

IV MBR hard drive recovery

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

Instructions for restoring hard disk sectors look like this:

After starting from a USB flash drive or disk, select "System Restore".

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

So, summing up the current release, which implies the independent elimination of the “Operating system not found” error, you will need to carry out the following manipulations:

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

- Check the connection of the loops.

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

- Check the operating mode of the hard disk in the BIOS and switch it to AHCI.

- Repair damaged sectors of the hard drive.

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

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

What does the Operating System not found error mean?

If you look at the message itself, it is easy to translate it as "the operating system was not found." But the trouble is, the user is absolutely sure that she is. 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 are most often manifested, for example, when a user removed a hard drive, replaced 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 happened, and the system constantly displays an Operating System not found message (Windows 7, 8, etc.), first of all, do not panic. To get started, just check, maybe a USB flash drive is inserted in the computer or laptop, and in the BIOS settings, the USB device is the priority for loading.

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

The simplest BIOS settings

The easiest way to change BIOS settings can be to reset all settings to the factory defaults (Default). In any version of the BIOS there is such a setting.

In an extreme case, 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 in the BIOS is detected, but the boot is still not performed, and the system again and again displays the warning Operating System not found. What to do in such a situation? First, see if there is a hard drive opposite the model. It signals that the device in the system, although present, is simply disconnected or not involved.

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

Switching Winchester Operating Modes in UEFI BIOS

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

In general, the SATA configuration has two main modes: 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, installing Windows on the hard drive will fail.

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 already clear, the system and displays the line Operating System not found. By the way, even if you install another fully functional “screw” at the moment, it will not work without changing the SATA settings to the initial ones.

Therefore, you should immediately advise users to change such settings only in the most extreme case, when it is really necessary.

Windows bootloader recovery

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

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

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

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

Before performing such actions, it is strongly recommended that you check for errors with their automatic correction (chkdsk / f / r or chkdsk / f / x / r commands). You can also use the chkntfs / x c checker: provided that there is an NTFS file system in the system partition (drive “C”).

If all else fails

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

As it is already clear, if the Winchester “sprinkled”, there's nothing to be done, you will have to change it to a new “hardware”, and then install the “OSes” again. You can, of course, try the action of the utility on it, but one hundred percent success in guaranteeing is quite difficult.

It is always unpleasant when, when you turn on the computer, an error appears on the black or blue screen instead of the usual Windows desktop. In this case, users are worried about the problem on the black screen that does not allow the system to boot, more precisely, the error says that the system does not exist at all. You can see it in this way:. It is written that the operating system was not found, let's understand.

What to do with the Operating system not found error

Why does this problem arise? The main culprit of the problem is connected with the hard drive and for most, though rarely, the cable has simply moved away from the connection port on the system board or the HDD itself. The second point - incorrect BIOS settings are set. For example, your hard drive is not in the first place, but in the last, or some other options are changed. Also, any faulty component, whether it is a power supply or something else may affect the occurrence of the indicated error.

Now in a row. Check BIOS for incorrectly set options. Tab Boot  or Advanced  make sure that the hard disk (HDD) is in the first place. If this is not the case, rearrange using the arrows or the F5 and F6 keys, depending on the BIOS version. If the settings are all correct, then simple. This will not get worse, but 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 it could simply have slipped off the cable. 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 disk failure. There is nothing left but to test it for operability from another PC.

With the advent of the operating system not found on the laptop, there is very little chance that the wires and cables will go away, since everything is tightly and compactly located there. Most likely your disk is simply faulty, or problems in the BIOS.

Software Solutions

We discussed the physical solution options above, and now let's see how this can be fixed programmatically.

Another and common problem is that they could install another on the hard drive where the operating system is installed. More precisely, try to do it. Eventually boot record  the old OS got jammed with the new one, but it so happened that not one OS is loaded and an 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 in the end I will add it here - replacement of the power supply. It could either be completely faulty (although I doubt that after that the computer would start up), or partially.

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

Now you know the basic solutions to the operating system not found error. I indicated the necessary links, otherwise I would have to rewrite what is already there. 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.

One of the most frightening mistakes of users is the one that appears when you turn on the computer and tells us, on the black BIOS screen, that "". When this message appears, loading our system will be impossible, and the only way out is to restart the computer by pressing "ctrl + alt + del", and 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 error problem is that the operating system is not displayed, and therefore the BIOS cannot load the Windows system. The reasons for the appearance of this error are very diverse: from a simple configuration error in the BIOS to a more serious problem, which in the worst case forces us to completely format the computer. For this, 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 several internal hard drives, external and USB flash drives are connected to the computer, it is likely that The BIOS is trying to find the operating system in the wrong place.  Therefore, without detecting the Windows system, it generates the error "The operating system was not 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 that it is not trying to load the wrong DVD.

If after this the problem is still not resolved, the next step will be the transition to the BIOS settings.

Change BIOS boot priority

Enter the BIOS configuration by pressing the F2, F12 or Delete buttons. After that, go to the configuration section Bootand put in first place in the graph Priorityhard drive on which the working and main operating system is Windows. It is called differently in different versions of BIOS, but you are looking for a word with a combination of Priority, which means "priority download". Here are a few names from different BIOSes: Hard Disk Priority, Boot Device Priority, Hard Disk Boot Priority.

May be useful:  . There you will find where to look around Priority  but do not forget what is there for the flash drive guide.

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 "the system is found when the computer is 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 maybe the reason our Windows does not start is probably in improperly configured UEFI secure boot.

Go back into the BIOS, find the configuration section Secure boot (Safe boot) and deactivate it or activate it if it is disabled to check if the error "The operating system was not found when the computer starts."

In different versions of BIOS or UEFI, the location of the settings looks different, but in any version of BIOS you are looking for a graph Secure boottry to disable or enable.

Reset BIOS to factory settings

At the bottom of the BIOS menu, you will see a key for default settings  or bIOS reset. On my car it is F9Confirm your decision when prompted and restart the computer.

If you did not find an example button, like F9 to reset to factory settings, then look for the line Load setup default  and reset the BIOS.

If your hard disk with the operating system is placed first, but the computer still does not boot, it is possible that some of the initial sectors of the disk were damaged, such as master boot record  (MBR) dOS boot record(DBR), or Download Configuration Database  (BCD).

Repair of these sectors is quite simple. All we need is to start the computer from a USB or Windows DVD. You can, for example, or simply start from and select "system recovery" when installing windows.

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

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

Activate the Windows partition

It is possible that the partition on which Windows is installed is disabled. You can fix this using your own Windows diskpart tool. To complete the following steps, you will again need a USB drive to install Windows. Run the command line, as described above, through the recovery disk or the Windows installation USB flash drive and at the command prompt, type the following commands:

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

Restart the computer and make sure that the error disappeared when you turn on the 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 foundclick to reload ctrl + alt + del.

Operating system not found

Everyone knows that the operating system is mainly located on the hard drive or on the SSD. And when people see this error on the screen, the first thought that arises in the head is that the hard drive is faulty or damaged.
  In most cases, this is true, although there are exceptions. Possible damage to the boot volume of your operating system;

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

operating system not found error what to do?

This is actually a mistake BIOS  and it can occur on any computer or laptop. No matter which operating system is installed, this error can occur as on Windows 10 so on Ubuntu.

BIOS  responsible for starting your computer, including the launch of the operating system. Showing the error message "Operating system not found" at system startup, your BIOS  trying to say that something does not allow you to load the operating system during computer startup.

Possible reasons for operating system not found dell:

As said an operating system wasn t found  can occur on any computer or laptop, regardless of whether you use a laptop Sony VAIO  or computer Dell.Some possible causes of the error:

• The computer boot volume is damaged.
• The BIOS needs a reboot.
• the internal hard drive cable of the computer is damaged.

Methods for fixing error error 1962 no operating system found:

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

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

Condition No. 1: What if your hard drive is listed in the BIOS?

If so, then it is entirely possible that some kind of 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 attached, and then restart the computer. If the error does not appear, some of your external USB  create a problem. If she still remains, try the following method.

Way 3 Use the recovery tool at startup because it will restore the Windows boot volume. These links will help you with this. \u003e\u003e
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If nothing can, I am afraid that I will have to reinstall the operating system.

Condition No. 2: What should I do if your hard drive is not in the BIOS list?

If your hard disk is not in the BIOS list, then it is quite possible that this problem may be related to a HDD / SSD malfunction;

So let's see what can be done here:

Replace cable Sata. In most cases, this little thing can save you a lot of money before you go buying a new hard drive for your computer; Open the case of your desktop computer and check the cable SATA  for visible damage. I'm talking about a desktop computer because laptops simply don't have this cable. Data transmission occurs through this cable, therefore its damage means the inability to use the hard drive for your computer. A SATA cable is much cheaper than a new hard drive, and I advise you to first buy a new cable and test the system with it.

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

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