Code:
2013-06-25 01:19:31, Error CSI 00000012 (F) HRESULT_FROM_WIN32(ERROR_SXS_ASSEMBLY_MISSING) #3088280# from Windows::ServicingAPI::CCSITransaction::ICSITransaction_PinDeployment(Flags = 0, a = 1e042f6e20d987b1e88bb63e9496b001, Version = 6.1.7600.20561, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral, cb = (null), s = (null), rid = [77]"Package_37_for_KB976098~31bf3856ad364e35~amd64~~6.1.1.1.976098-73_neutral_LDR", rah = [1]"2", manpath = (null), catpath = (null), ed = 0, disp = 0)[gle=0x80073701]
2013-06-25 01:19:31, Info CBS Failed to pin deployment while resolving Update: 976098-73_neutral_LDR from file: (null) [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
2013-06-25 01:19:31, Info CBS Failed to resolve item[0] in Package: Package_37_for_KB976098~31bf3856ad364e35~amd64~~6.1.1.1, Update: 976098-73_neutral_LDR [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
2013-06-25 01:19:31, Info CBS Failed to resolve execution update. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
2013-06-25 01:19:31, Error CBS Failed to resolve execution package: Package_37_for_KB976098~31bf3856ad364e35~amd64~~6.1.1.1 [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
2013-06-25 01:19:31, Info CSI 00000013@2013/6/24:23:19:31.828 CSI Transaction @0x1f1e80 destroyed
2013-06-25 01:19:31, Info CBS Perf: Resolve chain complete.
2013-06-25 01:19:31, Info CBS Failed to resolve execution chain. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
2013-06-25 01:19:31, Error CBS Failed to process single phase execution. [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING
2013-06-25 01:20:29, Info CBS Reboot mark refs: 0
2013-06-25 01:20:30, Info CBS SQM: Reporting package change for package: Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514, current: Partially Installed, pending: Default, start: Partially Installed, applicable: Installed, target: Installed, limit: Installed, hotpatch status: StillGoing, status: 0x0, failure source: Resolve, reboot required: False, client id: WindowsUpdateAgent, initiated offline: False, execution sequence: 813, first merged sequence: 813
2013-06-25 01:20:32, Info CBS SQM: Upload requested for report: PackageChangeBegin_Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514, session id: 101457923, sample type: Standard
2013-06-25 01:20:32, Info CBS SQM: Ignoring upload request because the sample type is not enabled: Standard
2013-06-25 01:20:32, Info CBS SQM: Reporting package change completion for package: Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514, current: Partially Installed, original: Partially Installed, target: Installed, status: 0x80073701, failure source: Resolve, failure details: "(null)", client id: WindowsUpdateAgent, initiated offline: False, execution sequence: 813, first merged sequence: 813
2013-06-25 01:20:32, Info CBS SQM: resolve time performance datapoint is invalid. [HRESULT = 0x80070490 - ERROR_NOT_FOUND]
2013-06-25 01:20:32, Info CBS SQM: stage time performance datapoint is invalid. [HRESULT = 0x80070490 - ERROR_NOT_FOUND]
2013-06-25 01:20:32, Info CBS SQM: execute time performance datapoint is invalid. [HRESULT = 0x80070490 - ERROR_NOT_FOUND]
2013-06-25 01:20:32, Info CBS SQM: Upload requested for report: PackageChangeEnd_Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514, session id: 101457924, sample type: Standard
2013-06-25 01:20:32, Info CBS SQM: Ignoring upload request because the sample type is not enabled: Standard
2013-06-25 01:20:32, Info CBS Enabling LKG boot option
2013-06-25 01:20:32, Info CBS Exec: End: nested restore point - complete.
2013-06-25 01:20:32, Info CBS Restored system sleep block state: 0x80000000
2013-06-25 01:20:32, Info CBS Exec: Processing complete. Session: 30306606_1399909444, Package: Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.1.17514 [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING
Please note that this is from my last update attempt, and this bit is before the last sfc /scannow, although I've done the scan a couple of times and it doesn't seem to do much.