Saltgrass,
Found the following near the end of the CBS.log file:
2019-11-06 08:01:12, Info CSI 000028d6 [SR] Beginning Verify and Repair transaction
2019-11-06 08:01:13, Error CSI 000028d7 (F) c000a2a7 [Error,Facility=(system),Code=41639 (0xa2a7)] #36272606# from Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysReadFile(h = 1278 ('\Device\HarddiskVolume5\Windows\WinSxS\amd64_microsoft-windows-n..orkconnectionbroker_31bf3856ad364e35_10.0.17134.1_none_422fdc892e0c33b3\ncbservice.dll'),
evt = 0, apcr = NULL, apcc = NULL, iosb = @0x4cd2f7b2e0, data = {l:0 b:}, byteoffset = 0, key = (null))
[gle=0xd000a2a7]
2019-11-06 08:01:13, Error CSI 000028d8@2019/11/6:13:01:13.098 (F) onecore\base\wcp\sil\ntsystem.cpp(3533): Error c000a2a7 [Error,Facility=(system),Code=41639 (0xa2a7)] originated in function Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysReadFile expression: (null)
[gle=0x80004005]
2019-11-06 08:01:13, Info CBS Added C:\windows\Logs\CBS\CBS.log to WER report.
2019-11-06 08:01:13, Info CBS Added C:\windows\Logs\CBS\CbsPersist_20191106125128.log to WER report.
2019-11-06 08:01:13, Info CBS Added C:\windows\Logs\CBS\CbsPersist_20191102153236.log to WER report.
2019-11-06 08:01:13, Info CBS Added C:\windows\Logs\CBS\CbsPersist_20191102115914.log to WER report.
2019-11-06 08:01:13, Info CBS Added C:\windows\Logs\CBS\CbsPersist_20191031145713.cab to WER report.
2019-11-06 08:01:13, Info CBS Could not get active session for current session file logging [HRESULT = 0x80004003 - E_POINTER]
2019-11-06 08:01:13, Info CBS Not able to add pending.xml to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]
2019-11-06 08:01:13, Info CBS Not able to add pending.xml.bad to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]
2019-11-06 08:01:13, Info CBS Not able to add SCM.EVM to Windows Error Report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]
2019-11-06 08:01:13, Error CSI 000028d9 (F) c000a2a7 [Error,Facility=(system),Code=41639 (0xa2a7)] #36272605# from Windows::Rtl::SystemImplementation::CFile::ReadFile(Flags = 3, Buffer = {l:0 ml:376832 b:}, Offset = 0, Disposition = 0)[gle=0xd000a2a7]
2019-11-06 08:03:22, Info CBS Trusted Installer is shutting down because: SHUTDOWN_REASON_AUTOSTOP
2019-11-06 08:03:22, Info CBS TiWorker signaled for shutdown, going to exit.
Looks like sfc then terminated. The run had been clean up to this point.
pete vh