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From: MrSoftware on 13 Apr 2010 06:01

I found the following;

[1] Major Components

- BITS = Background Intelligent Transfer Service
- MSI = Microsoft Installer Service
- SUS = Software Update Services
- WSUS = Windows Server Update Server
- WU = Windows Update
- WUAU = Windows Update Automatic Update

[2] Minor Components

- AGENT - Windows Update agent
- AU - Automatic Updates is performing this task
- AUCLNT - Interaction by AU with the logged on user
- CDM - Device Manager
- CMPRESS - Compression agent
- COMAPI - Windows Update API
- DRIVER - Device driver information
- DTASTOR - Handles database transactions
- DWNLDMGR - Creates and monitors download jobs
- EEHNDLER - Expression handler used to evaluate update applicability
- HANDLER - Manages the update installers
- MISC - General service information
- OFFLSNC - Detect available updates when not connected to the network
- PARSER - Parses expression information
- PT - Protocol Talker : 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
available
- SHUTDWN - Install at shutdown feature
- WUREDIR - The Windows Update redirector files
- WUWEB - The Windows Update ActiveX control


See article:

MS Article ID - 902093 - How to read the Windowsupdate.log file

http://support.microsoft.com/default.aspx/kb/902093?p=1


"MrSoftware" wrote:

> In examining WindowsUpdate.log I noticed the following entities.
>
> COMAPI, AU, PT, Agent, DnldMgr, Handler, DtaStor
>
> Near as I can figure:
>
> AU = Automatic Update
> WU = Windows Update
> Agent = WU Agent
> DnlMgr = WU Download Manager
> Handler = WU Install 'handler' : Actually installs the update
>
> But I'm not sure on the following;
>
> COMAPI = ?
> DtaStor = ?
> PT = ?
>
> Does anyone know what the COMAPI, DtaStor and PT entities are?
>
>
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