Experiencing this error while trying to install the new CU KB4586853 [19041.662.1.10] & here's the data from the LOG file Spoiler: LOG Info DISM DISM Package Manager: PID=3936 TID=8456 Error in operation: source for package or file not found, ResolveSource() unsuccessful. (CBS HRESULT=0x800f081f) - CCbsConUIHandler::Error Error DISM DISM Package Manager: PID=3936 TID=3796 Failed finalizing changes. - CDISMPackageManager::Internal_Finalize(hr:0x800f081f) Error DISM DISM Package Manager: PID=3936 TID=3796 The source files could not be found; their location must be specified using the /source option to restore the feature. - GetCbsErrorMsg Error DISM DISM Package Manager: PID=3936 TID=3796 Failed processing package changes - CDISMPackageManager: : ProcessChanges(hr:0x800f081f) Error DISM DISM Package Manager: PID=3936 TID=3796 The source files could not be found; their location must be specified using the /source option to restore the feature. - GetCbsErrorMsg Info DISM DISM Package Manager: PID=3936 TID=3796 Loaded servicing stack for online use only. - CDISMPackageManager::CreateCbsSession Error DISM DISM Package Manager: PID=3936 TID=3796 Failed while processing command add-package. - CPackageManagerCLIHandler::ExecuteCmdLine(hr:0x800f081f) Info DISM DISM Package Manager: PID=3936 TID=3796 Further logs for online package and feature related operations can be found at %WINDIR%\logs\CBS\cbs.log - CPackageManagerCLIHandler::ExecuteCmdLine Error DISM DISM.EXE: DISM Package Manager processed the command line but failed. HRESULT=800F081F Info DISM DISM Provider Store: PID=3936 TID=3796 Found the OSServices. Waiting to finalize it until all other providers are unloaded. - CDISMProviderStore::Final_OnDisconnect Info DISM DISM Provider Store: PID=3936 TID=3796 Found the OSServices. Waiting to finalize it until all other providers are unloaded. - CDISMProviderStore::Final_OnDisconnect Info DISM DISM Provider Store: PID=3936 TID=3796 Found the PE Provider. Waiting to finalize it until all other providers are unloaded. - CDISMProviderStore::Final_OnDisconnect Info DISM DISM Provider Store: PID=3936 TID=3796 Finalizing the servicing provider(DISM Package Manager) - CDISMProviderStore::Internal_DisconnectProvider Info DISM DISM Package Manager: PID=3936 TID=3796 Finalizing CBS core. - CDISMPackageManager::Finalize Info DISM DISM Provider Store: PID=3936 TID=3796 Disconnecting Provider: DISM Package Manager - CDISMProviderStore::Internal_DisconnectProvider Any workaround?