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0xC05CFF06: ERROR_SVHDX_UNIT_ATTENTION_OPERATING_DEFINITION_CHANGED

Windows Error Code Lookup: Decode Windows error codes: Win32, HRESULT (0x80070005), NTSTATUS, Windows Update, msiexec and blue-screen stop codes, with what to check next.

Paste the number from an error dialog, event log, script or setup log: 0x80070005, 80070005, -2147024891, 1603, 0xC0000005, a stop code like 0x7E, a name like E_ACCESSDENIED, or a few words. You get every way Windows could mean that number (an HRESULT often wraps a Win32 error, so 0x80070005 is "Access is denied" too), its parts decoded, and what to check for the common ones. Names and messages come from the Windows SDK headers and Windows' own message tables; see Microsoft's System Error Codes and [MS-ERREF] for the full references.

Try: 0x80070005, 1603, 0xC0000005, 0x800F081F, 0x8024402C, 0x7E, access denied

0xC05CFF06 = 3,227,320,070 = -1067647226

HRESULT 0xC05CFF06

ERROR_SVHDX_UNIT_ATTENTION_OPERATING_DEFINITION_CHANGED

The data storage format of the device has changed, resulting in a Unit Attention condition.

Severity (bit 31)1: failure
Customer (bit 29)0: Microsoft
NTSTATUS inside (bit 28)0
Facility92 (0x05C)
Code65286 (0xFF06)

NTSTATUS 0xC05CFF06

STATUS_SVHDX_UNIT_ATTENTION_OPERATING_DEFINITION_CHANGED

The data storage format of the device has changed, resulting in a Unit Attention condition.

Becomes the Win32 error: 3227320070

Severity (bits 30-31)3: Error
Customer (bit 29)0: Microsoft
Facility92 (0x05C) SHARED_VHDX
Code65286 (0xFF06)