STOP 0x000000ED

UNMOUNTABLE_BOOT_VOLUME

Windows found its boot drive but couldn't mount the file system on it. Usually file-system corruption after a bad shutdown, a failing drive, or a damaged cable.

Likely causes, most common first

File-system corruption after power loss or forced shutdown
A failing drive or loose/damaged SATA cable
Storage mode changed in the BIOS

How to fix it

1. Repair the file system from recovery moderate

Let the PC fail to boot twice → the blue Recovery screen appears (or boot from a Windows USB stick).
Troubleshoot → Advanced options → Command Prompt.
Run: chkdsk C: /f /r and let it finish (this can take a long time).
Then run Startup Repair from the same menu and reboot.

The four parameters on the blue screen

Windows shows four hex numbers with this stop code. Here's what each means — our analyzer decodes them automatically from your dump file.

Parameter 1	The device object of the boot volume
Parameter 2	Status code of the failed mount
Parameter 3	Reserved
Parameter 4	Reserved

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