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If Windows cannot load the main drivers and other basic dependencies, the UNMOUNTABLE_BOOT_VOLUME error will also occur, in case Windows requires the driver to connect to the hard drive controller, but is instructed to load from the wrong partition (not is the real installed partition).

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This error occurs due to one or more of the following:Ĭause 1: Driver drive controller is corrupted or incompatibleĪs explained above, if Windows cannot determine and connect to the hard drive controller, responsible for the drive where the system partition is located, the Windows kernel will not be able to read and load the basic dependencies from the drive, therefore, the blue screen above will appear.Ī common cause of this error is to uninstall or update / upgrade failed hard drive controller drivers.įor example, if the Intel or LSI drive management driver is deleted, corrupted, uninstalled or upgraded incorrectly and Windows has no 'original', basic support for a specific hard drive controller is in use, Windows will not be able to communicate with the drive adapter to read the required data, resulting in a deadly blue screen error UNMOUNTABLE_BOOT_VOLUME.Ĭause 2: Try to load Windows from an incorrect partition If Windows cannot determine and connect to the hard drive controller (whether integrated into the motherboard or as a PCI-E card) or if the hard drive controller is successfully online but Windows cannot read the drive It is being booted from there for various reasons, such as the UNMOUNTABLE_BOOT_VOLUME error that may appear. In general, the basic input / output drivers are able to work with different systems without requiring any special compatibility, since most of the hardware they connect has been designed and build to the standard - even if not everyone complies with RFC and other official standards, in addition to controllers for hard drive drivers. With the latest Windows versions and especially after the kernel and driver reconstruction that took place during Windows Vista development, this list of components has been reduced and now includes only input / output drivers.

While Windows, based on the microkernel-esque structure, can load dependencies and components flexibly, has a basic dependency set, it must be absolutely online in the boot process, otherwise Windows will not boot, even if the kernel is issued. The UNMOUNTABLE_BOOT_VOLUME error is a sign that Windows cannot mount the boot file system to read / download the necessary dependencies from there. The cause of the UNMOUNTABLE_BOOT_VOLUME error Sometimes the error message also has another 'variant' as follows: When booting a PC running Windows XP, Windows Vista or Windows 7, you may encounter a blue screen of death (BSOD) with an error message, UNMOUNTABLE_BOOT_VOLUME, and usually a stop code STOP: 0x000000ED, similar to a screenshot underneath: The following information about this error has been compiled, based on information gathered by global engineers, developers and technicians or organizations. Overview of UNMOUNTABLE_BOOT_VOLUME error

Solution 2: Change IDE / RAID / AHCI mode in BIOS.

#Windows 7 stop 0xed how to#

How to fix 1: Roll back the driver controller drive with System Restore.Error correction 'UNMOUNTABLE BOOT VOLUME BSOD' on Windows.The cause of the UNMOUNTABLE_BOOT_VOLUME error.Overview of UNMOUNTABLE_BOOT_VOLUME error.Instructions for troubleshooting UNMOUNTABLE_BOOT_VOLUME error