There is probably no need to explain how all users of Windows-based computer systems are not only annoyed, but also frightened by the appearance of the “death screen” (BSoD). And if there is still the line UNMOUNTABLE_BOOT_VOLUME, this completely leads the user into shock. But let's find out if everything is so scary, and is it possible to correct the situation without formatting the disk and reinstalling the operating system? Looking ahead, we note that this is done quite simply. It takes just a little patience and time.
What does the message with the string UNMOUNTABLE_BOOT_VOLUME mean?
Let's start with determining the nature of the failure. First of all, the message UNMOUNTABLE_BOOT_VOLUME just needs to be translated from English. Then everything will become clear.
Such a failure indicates that the system does not recognize the boot volume, and, literally, it is not able to mount it. As a result - the impossibility of starting the “OS” from the section where it was originally installed. How to deal with this?
Bug Fix UNMOUNTABLE_BOOT_VOLUME Windows XP
In fact, everything is simple here. In this situation, the user will need an installation disk or any other such as a Live CD from which it will need to boot, after installing the CD / DVD-ROM in the BIOS as a priority device for installation (usually these are Boot Sequence, Boot Device Priority parameters or something else in that spirit).
If you boot from the installation disk, you need to wait for the installation to start and in the first window go to the recovery console. To do this, you need to press the R key. If you have a Live CD, you can also use the specified transition, but there may be a special section (it all depends on which software package is recorded on the optical medium). Next, select the system partition on which the "OS" is installed. After that, you will be prompted to enter a password, if any. Half the job done.
Now, to fix the problem, call the command line (cmd) and write the following in it: chkdsk c: / r (this is an option if the C partition is the system partition). After that, press the enter key and wait for the verification process to complete. In time, it can take about 30 minutes, or even more (depending on the size of the system volume).
In the process of detecting errors, which is very interesting, the damaged clusters will be converted to files (this is indicated by the letter r indicated in the check command). And this also avoids the loss of user information. By the way, you can use the command without specifying the letters of the system volume, anyway it will be detected automatically. The same goes for the password request. In some cases, the console starts without it.
When the test is completed successfully, you can simply exit the console or issue the exit command. After rebooting, a screen with the line UNMOUNTABLE_BOOT_VOLUME will more than appear. In fairness, it is worth noting that the chkdsk team itself, in different variations with the addition of one or another letter, is capable of fixing a huge number of errors, so it’s worth examining them (you never know when this can come in handy).
Error correction in Windows 7 and higher
The UNMOUNTABLE_BOOT_VOLUME Windows 7 crash is fixed in much the same way.
The only difference is that to quickly invoke the command line when switching to the system recovery menu, you can use the combination Shift + F10, although there is also a corresponding section in the main menu of the console. Further, everything is done exactly the same as described in the first case.
Conclusion
That, in fact, is all that concerns this seemingly unpleasant glitch and the appearance of a blue screen. As you can see, you should not be scared. Here you only need to pay attention to the tools that will be needed to correct the situation: the presence of a boot suit or flash drive, as well as pre-setting parameters in the BIOS. Otherwise, everything, as they say, is elementary simple - just one team. Actually, not only an unprepared user, but even a child can do the above procedures.