Your error is:
2014-06-24T12:03:52.171-07:00 [03856 error 'task-8'] [GetVolumeClusterInfo] Windisk_GetVolumeClusterInfo(\\.\GLOBALROOT\Device\HarddiskVolumeShadowCopy1) failed: 87
Something with VSS goes wrong.
Try to log in and convert with user named 'administrator'.
HTH