The state of the update after its post-reboot operation has completed is unexpected.
The OS servicing stack must be updated before this update is downloaded or installed.
An update handler error not covered by another WU_E_UH_* code.
A download manager operation could not be completed because the requested file does not have a URL.
A download manager operation could not be completed because the file digest was not recognized.
A download manager operation could not be completed because the file metadata requested an unrecognized hash algorithm.
An operation could not be completed because a download request is required from the download handler.
A download manager operation could not be completed because the network connection was unavailable.
A download manager operation could not be completed because the version of Background Intelligent Transfer Service (BITS) is incompatible.
The update has not been downloaded.
A download manager operation failed because the download manager was unable to connect the Background Intelligent Transfer Service (BITS).
A download manager operation failed because there was an unspecified Background Intelligent Transfer Service (BITS) transfer error.
A download must be restarted because the location of the source of the download has changed.
A download must be restarted because the update content changed in a new revision.
There was a download manager error not covered by another WU_E_DM_* error code.
Windows Update Agent could not be updated because an INF file contains invalid information.
Windows Update Agent could not be updated because the wuident.cab file contains invalid information.
Windows Update Agent could not be updated because of an internal error that caused setup initialization to be performed twice.
Windows Update Agent could not be updated because setup initialization never completed successfully.
Windows Update Agent could not be updated because the versions specified in the INF do not match the actual source file versions.
Windows Update Agent could not be updated because a WUA file on the target system is newer than the corresponding source file.
Windows Update Agent could not be updated because regsvr32.exe returned an error.
An update to the Windows Update Agent was skipped because previous attempts to update have failed.
An update to the Windows Update Agent was skipped due to a directive in the wuident.cab file.
Windows Update Agent could not be updated because the current system configuration is not supported.
Windows Update Agent could not be updated because the system is configured to block the update.
Windows Update Agent could not be updated because a restart of the system is required.
Windows Update Agent setup is already running.
Windows Update Agent setup package requires a reboot to complete installation.
Windows Update Agent could not be updated because the setup handler failed during execution.
Windows Update Agent could not be updated because the registry contains invalid information.
Windows Update Agent must be updated before search can continue.
Windows Update Agent must be updated before search can continue. An administrator is required to perform the operation.
Windows Update Agent could not be updated because the server does not contain update information for this version.
Windows Update Agent could not be updated because of an error not covered by another WU_E_SETUP_* error code.
An expression evaluator operation could not be completed because an expression was unrecognized.
An expression evaluator operation could not be completed because an expression was invalid.
An expression evaluator operation could not be completed because an expression contains an incorrect number of metadata nodes.
An expression evaluator operation could not be completed because the version of the serialized expression data is invalid.
The expression evaluator could not be initialized.
An expression evaluator operation could not be completed because there was an invalid attribute.
An expression evaluator operation could not be completed because the cluster state of the computer could not be determined.
There was an expression evaluator error not covered by another WU_E_EE_* error code.
The results of download and installation could not be read from the registry due to an unrecognized data format version.
The results of download and installation could not be read from the registry due to an invalid data format.
The results of download and installation are not available; the operation may have failed to start.
A failure occurred when trying to create an icon in the taskbar notification area.
Unable to show UI when in non-UI mode; WU client UI modules may not be installed.
Unsupported version of WU client UI exported functions.
There was a user interface error not covered by another WU_E_AUCLIENT_* error code.