Error Reboot and select boot device proper: causes, remedies

The appearance of a message on the screen of the monitor containing the inscription Reboot and select proper boot device, of many users thoroughly puzzles. The start of the operating system is not possible. But why? Next, it is proposed to consider the essence of this computer failure and apply a few simple solutions for its correction. But for their use, initially, at least approximately, you need to know what actually caused such a hard-hitting failure.

Error Reboot and select proper boot device: what is it?

Actually, the very nature of the error must be considered from the point of view of a purely technical translation of the message that appears.

In this case, it suggests rebooting the computer and selecting the boot device correctly. In general, the appearance of such a message indicates that the OS can not be launched from the hard disk. By the way, the second line in the messages suggests inserting the bootable media and starting from it. It should be understood that on the recovery discs there are a lot of interesting tools that allow to eliminate such problems (for example, also the command line). But first things first.

Possible causes of error

But why is there a situation where a notification is issued with the text Reboot and select proper boot device? In the simplest and most banal case, this can be due only to the fact that the user has set the boot priority in the BIOS for a removable device, and when restarting, simply forgot to remove it from the drive or port. But only this problem is not limited.

Among the most common reasons for the appearance of the Reboot and select proper boot device are:

• Mismatched settings of the primary system (BIOS / UEFI);
• Errors or hard drive damage;
• Disruption of the system loader;
• Penetration into the system of viruses;
• Power supply failure, etc.

BIOS settings and boot options

The first step is to check the BIOS settings. In this case, the issue of restoring the system boot after checking the installed components is to specify the hard drive as the first device.

This is done in the Boot section, where a string is selected that contains in the description something like Boot device priority or Boot sequence. Here you just need to set the hard drive to first place or use the selection keys PageUp / PageDown, on the first line. Needless to say, after this, the set parameters must be saved (F10 + Y).

However, even after this, the new parameters can, as they say, "fly off". In stationary computers, the Reboot and select proper boot device again appears on the boot. Why?

The case may be that the life of the CMOS battery that is located on the motherboard is over and is responsible for storing the set BIOS parameters when the terminal is off. Conclusion: the battery needs to be simply replaced. Indirectly, the reason may be damage to the power supply unit or voltage drops in the mains. There will either have to try to replace the unit, or install an additional voltage regulator.

Notebook Reboot and select proper boot device can give out completely for another reason. Very often this is due to the presence of the primary UEFI system, and not the BIOS, when the user just does not have time to apply a shortcut to enter the configuration interface. You'll have to try to press the right combination in time, but sometimes the inscription disappears, after which you can log into the system, use the power settings and uncheck the quick boot option.

The system writes "Reboot and select proper boot device": issues of the hard drive

In some cases, when starting the boot, you can use the F9 or F10 keys, which help to bring up the boot menu and select the desired drive or device. But this method is suitable for a one-time start. But if the problem is in the hard disk, and the Reboot and select proper boot device line appears constantly, you will have to apply the cardinal measures.

Errors on the disk - this is not the worst. You can check the hard drive and fix its state from the command line when starting from the recovery disk (chkdsk / r / f / x /). But what if the failures are not of a program but of a physical nature?

We will have to perform a test taking into account surface testing. For this, one of the good tools can be called disk utility Hiren's Boot CD. Also, the HDD Regenerator console program can be used for testing, but its use can be justified only in case the hard drive starts to "crumble". But the first utility fixes bad clusters and sectors immediately.

Loader corruption

Finally, another problem can be that the hard disk has a damage to the boot area and the loader itself.

Here it is necessary to use the command line again when starting from removable media (usually it is called via the combination Shift + F10).

To restore, use the three commands shown in the image above. The first two are mandatory, the third - if they did not give the proper result when restarting the computer system.

The situation with disruption of the bootloader may be associated with the impact of some varieties of virus threats (in this case, the appearance of the Reboot and select proper boot device is also possible).

But to struggle with such things it is necessary exclusively by means of programs with the general name Rescue Disk which are written down on removable carriers (optical disks or USB-stores), and loading is carried out from them (naturally, with installation of such devices as priority for start in BIOS ).

Instead of the total

In general, only the main possible reasons for the fact that the start of the operating system is not possible were mentioned here. Unfortunately, it's impossible to say at once that it was the primary source of the appearance of a malfunction, and what decision to apply to correct the situation is impossible. It is necessary to act, as they say, at random. But if you approach the question purely for practical reasons, you first need to check the parameters of the primary BIOS system, the state of the hard disk and restore (or even overwrite) the boot record. Perhaps such actions will help.

If none of the above methods works, then you have to change the hard drive, since the critical errors can be related solely to the fact that it began to go out of order. There's nothing you can do about it, and, of course, it's completely naive to hope for the HDD Regenerator program. No matter how good it may be, absolutely all problems with the hard disk can not be eliminated simply.