In fact, the emergence of such a mistake not necessarily say that the BIOS set the boot order wrong, the matter is that there may be errors on your hard disk, caused by the actions of the user or viruses, and other causes. Let's consider the most likely one.
Simple, often working method
In my experience, the error No bootable device, Reboot and select proper boot device often occur not because of any hard disk fault, the BIOS settings wrong or corrupt the MBR, and in connection with the more prosaic things.
Error reboot and select proper boot device
The first thing to try if there was such a mistake - learn from your desktop or laptop all flash drives, CD drives, external hard drives and try to turn it back on: it may very well be that the download was successful.
If this option is helped, it would be nice to find out why there are mistakes at all boot device when the connected drives.
First of all, go to the computer's BIOS and set the boot priority check - system hard drive should be installed as First boot device (how to change the boot order in the BIOS is described here - with regard to the flash drive, but it is almost as hard disk). If it is not, then set the correct order and save the settings.
In addition, usually in the office or on the old home computers've encountered an error for the following reasons - stranded battery on the motherboard and the computer off from the outlet, as well as problems of power (power surges) or the computer power supply. One of the main symptoms of the fact that one of these reasons apply to your situation - the time and date will be reset each time the computer is turned on or just go wrong. In this case, I recommend to replace the battery on the computer motherboard, take measures to ensure a stable power supply, and then configure the correct boot order in the BIOS.
Errors select proper boot device, or no bootable device and MBR Windows
The errors described may also indicate that the Windows loader has been damaged. This can happen due to malicious programs (viruses), turn off the electricity in the house, incorrectly shutting down the computer, experiments in an inexperienced user over the hard disk partitions (resizing, formatting), install additional operating systems on a computer.
I have two step-by-step guides on this topic on remontka.pro, which should help in all listed cases, with the exception of the latter, which is slightly lower.
- Windows 7 and 8 bootload recovery
- Windows XP boot recovery
If the Boot Device-related errors appeared after installing the second operating system, the above instructions may not help, and only the initially installed operating system will most likely be launched. You can describe the situation with an indication of the OS and the order of installation in the comments, I will try to help (usually answered during the day).
Other possible causes of error
And now about the least pleasant reasonable causes - problems with the Boot Device itself, that is, the system hard disk of the computer. If the BIOS does not see the hard disk, while it (HDD) may make strange sounds (but not necessarily) - then it may have arisen physical damage and that is why the computer does not boot. This can occur due to the drop in the laptop or shocks along the computer case, sometimes - in connection with the unstable power supply, and often the only possible solution remains the replacement of the hard disk.
Note: The fact that the BIOS does not display the hard disk can be caused not only by damage, I recommend checking the connection of the interface cable and power supply. Also, in some cases, the hard disk may not be determined due to the failure of the power supply of the computer - if some suspicions have recently, I recommend checking (Symptoms: The computer does not turn on the first time, when it is turned off, other strange is rebooted. Things with turning on-shutdown).
I hope that something from this will help you correct the errors No Bootable Device Available or Reboot and Select Proper Boot Device, if not - ask questions, I will try to answer.