1. Windows Update Client 8.1
2. Windows Update Client Error 20
3. Windows Update Client Kb3112343
4. Windows Update Client Side Targeting
5. Windows Update Client Error

The latest version of the Windows Update Agent for Windows 7, Windows Vista, and Windows XP is 7.6.7600.256. Improvements in version 7.6.7600.256 of the Windows Update Agent. A hardened infrastructure so that the Windows Update client will trust only those files that are signed by a. Mar 01, 2016  Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. Download Microsoft OneDrive apps to sync files on a Windows PC or Mac. Download mobile apps to upload files from your phone or tablet. Nov 17, 2016  I've tried using the Windows Update troubleshooter. I've tried stopping the service and clearing the softwaredistribution folder and then starting the service. I've tried installing the latest Windows Update client. I have another workstation that updates without issues. Any other suggestions?

Find Windows Update using your Start Screen. Windows Update is included in the Control Panel.

While Windows Updates works smoothly most of the time, users may at times encounter issues while running Windows Update – like for instance – despite updates being available, the service might not detect and install them, updates might get not get installed properly, thus creating issues, the Windows Update service might be stuck at ‘updating’ and not update at all, and so on.

While one could try restarting the system, re-initiating the Windows Update service, rolling back previous updates if possible, troubleshooting Windows Update, run the Windows Update Troubleshooter, it may not always work. We have already seen how to manually reset Windows Update components to default. Today we will take a look at a Reset Windows Update Client Script that will completely reset the Windows Update client settings.

Reset Windows Update Client

This script will completely reset the Windows Update client settings. It has been tested on Windows 7, 8, 10, and Server 2012 R2. It will configure the services and registry keys related to Windows Update for default settings. It will also clean up files related to Windows Update, in addition to BITS related data. Because of some limitations of the cmdlets available in PowerShell, this script calls some legacy utilities (sc.exe, netsh.exe, wusa.exe, etc).

Take a backup of your data, restart your Windows system and log in as Administrator.

Download the PowerShell file from Technet. Right-click on the Reset-WindowsUpdate.psi file and select Run with PowerShell.

You will be asked to confirm. Once you confirm, the script will run and reset Windows Update client.

The tool configures the registry keys, settings and services to default values. All updates are reset and once done, the system can be rebooted and the updates reinstalled.

Once the process is over, the PowerShell window will exit.

We had earlier also taken a look at another tool called Reset Windows Update Agent Tool that lets you reset the WU Agent to default values. This tool been updated to be compatible with Windows Creator update and has been downloaded by more than 100,000 users.

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Applies to: Windows 10

The following table describes the log files created by Windows Update.

Windows Update Client 8.1

Generating WindowsUpdate.log

To merge and convert WU trace files (.etl files) into a single readable WindowsUpdate.log file, see Get-WindowsUpdateLog.

Note

When you run the Get-WindowsUpdateLog cmdlet, an copy of WindowsUpdate.log file is created as a static log file. It does not update as the old WindowsUpate.log unless you run Get-WindowsUpdateLog again.

Windows Update log components

The WU engine has different component names. The following are some of the most common components that appear in the WindowsUpdate.log file:

• AGENT- Windows Update agent
• AU - Automatic Updates is performing this task
• AUCLNT- Interaction between AU and the logged-on user
• CDM- Device Manager
• CMPRESS- Compression agent
• COMAPI- Windows Update API
• DRIVER- Device driver information
• DTASTOR- Handles database transactions
• EEHNDLER- Expression handler that's used to evaluate update applicability
• HANDLER- Manages the update installers
• MISC- General service information
• OFFLSNC- Detects available updates without network connection
• PARSER- Parses expression information
• PT- Synchronizes updates information to the local datastore
• REPORT- Collects reporting information
• SERVICE- Startup/shutdown of the Automatic Updates service
• SETUP- Installs new versions of the Windows Update client when it is available
• SHUTDWN- Install at shutdown feature
• WUREDIR- The Windows Update redirector files
• WUWEB- The Windows Update ActiveX control
• ProtocolTalker - Client-server sync
• DownloadManager - Creates and monitors payload downloads
• Handler, Setup - Installer handlers (CBS, and so on)
• EEHandler - Evaluating update applicability rules
• DataStore - Caching update data locally
• IdleTimer - Tracking active calls, stopping a service

Note

Windows Update Client Error 20

Many component log messages are invaluable if you are looking for problems in that specific area. However, they can be useless if you don't filter to exclude irrelevant components so that you can focus on what’s important.

Windows Update log structure

The Windows update log structure is separated into four main identities:

• Time Stamps
• Process ID and Thread ID
• Component Name
• Update Identifiers
  • Update ID and Revision Number
  • Revision ID
  • Local ID
  • Inconsistent terminology

The WindowsUpdate.log structure is discussed in the following sections.

Time stamps

The time stamp indicates the time at which the logging occurs.

• Messages are usually in chronological order, but there may be exceptions.
• A pause during a sync can indicate a network problem, even if the scan succeeds.
• A long pause near the end of a scan can indicate a supersedence chain issue.
  

Process ID and thread ID

The Process IDs and Thread IDs are random, and they can vary from log to log and even from service session to service session within the same log.

• The first four hex digits are the process ID.
• The next four hex digits are the thread ID.
• Each component, such as the USO, WU engine, COM API callers, and WU installer handlers, has its own process ID.
  

Component name

Search for and identify the components that are associated with the IDs. Different parts of the WU engine have different component names. Some of them are as follows:

• ProtocolTalker - Client-server sync
• DownloadManager - Creates and monitors payload downloads
• Handler, Setup - Installer handlers (CBS, etc.)
• EEHandler - Evaluating update applicability rules
• DataStore - Caching update data locally
• IdleTimer - Tracking active calls, stopping service

Update identifiers

Update ID and revision number

There are different identifiers for the same update in different contexts. It’s important to know the identifier schemes.

• Update ID: A GUID (indicated in the previous screen shot) that's assigned to a given update at publication time
• Revision number: A number incremented every time that a given update (that has a given update ID) is modified and republished on a service
• Revision numbers are reused from one update to another (not a unique identifier).
• The update ID and revision number are often shown together as '{GUID}.revision.'

Revision ID

• A Revision ID (do no confuse this with “revision number”) is a serial number that's issued when an update is initially published or revised on a given service.
• An existing update that’s revised keeps the same update ID (GUID), has its revision number incremented (for example, from 100 to 101), but gets a completely new revision ID that is not related to the previous ID.
• Revision IDs are unique on a given update source, but not across multiple sources.
• The same update revision may have completely different revision IDs on WU and WSUS.
• The same revision ID may represent different updates on WU and WSUS.

Local ID

Windows Update Client Kb3112343

• Local ID is a serial number issued when an update is received from a service by a given WU client
• Usually seen in debug logs, especially involving the local cache for update info (Datastore)
• Different client PCs will assign different Local IDs to the same update
• You can find the local IDs that a client is using by getting the client’s %WINDIR%SoftwareDistributionDatastoreDatastore.edb file

Inconsistent terminology

• Sometimes the logs use terms inconsistently. For example, the InstalledNonLeafUpdateIDs list actually contains revision IDs, not update IDs.

• Recognize IDs by form and context:

  • GUIDs are update IDs
  • Small integers that appear alongside an update ID are revision numbers
  • Large integers are typically revision IDs
  • Small integers (especially in Datastore) can be local IDs

Windows Update Client Side Targeting

Windows Setup log files analysis using SetupDiag tool

Windows Update Client Error

SetupDiag is a diagnostic tool that can be used for analysis of logs related to installation of Windows Updates. For detailed information, see SetupDiag.