VM_E_DRIVE_BUS_LOC_IN_USE

Code: 0xA0040503 (2684617987)

As HRESULT:

S: 1 (Failure)
C: 1 (Customer-defined)
N: 0 (Not an NTSTATUS value)
Facility: 0x004 (FACILITY_ITF: COM/OLE Interface management)
Code: 0x0503 (1283)

As NTSTATUS:

Sev: 2 (STATUS_SEVERITY_WARNING)
C: 1 (Customer-defined)
Facility: 0x004 (FACILITY_IO_ERROR_CODE: Input/Output)
Code: 0x0503 (1283)

Documented in Win32

HRESULT Codes Specific to Windows Virtual PC (vpccominterfaces.h): 0xA0040503

The specified bus location is in use.