Yes, Office Web Components was uninstalled successfully -- the Windows
Installer Cleanup tool shows no trace of it.

As for the update log files, for some reason they are not present.  I recall
they were present and they did mention failures when trying to update Web
Components, but now they are not there.

I have to guess that Web Components was initially installed by a SQL Server
2005 installation, in which case it should be v3.  And I was able to run
OWC11.MSI from the SQL DVD, which puts me back to where I was when I started
this thread (unless the SQL server installation also did some configuration
that was lost when I uninstalled it?).  And I found log files for the
OWC11.EXE attempted installations.  I've included the entire first log
below -- hopefully the errors at :the end of it will tell you something
useful.

Detected Windows Info:
 PlatformId = 2
 MajorVersion = 5
 MinorVersion = 2
 ServicePackLevel = 1
- - - - - - - - - - - - - - - - - - - - - - -
Launch Setup
5/18/2006 11:47:34 AM
Recognized command line switch iexpress
Found property assignment: CDCACHE=2
Setup path: C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.EXE
Trying to get version of
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.EXE
...succeeded.
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.EXE is version 11.0.8003.0
Current version of Setup.exe: 11.0.8003.0
Searching for .INI file: SETUP.INI
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\FILES\SETUP\SETUP.INI
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP\SETUP.INI
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI
Settings file located: C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI
GetTempPath returned: C:\DOCUME~1\bradd\LOCALS~1\Temp\

Reading settings file
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI
Located: C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\OWC11.MSI
Package to install: C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\OWC11.MSI
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Product\SkipLangCheck" (Default: 0)
Value: 0
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Product\CheckUpdates" (Default: 0)
Value: 0
Product {90A40409-6000-11D3-8CFE-0150048383C9} is not installed for the
user.
Checking for Windows Installer....
C:\WINDOWS\system32\MSI.DLL
.. succeeded.
Checking for any beta version of the product.
dwNoLtCoExist = 0
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\CacheOnly" (Default: 0)
Value: 0
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\RemoveCacheOnly" (Default: 0)
Value: 0
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\EnforceCache" (Default: 0)
Value: 1
Office-specific properties added: CDCACHE="2"
General properties added: LAUNCHEDFROMSETUP="1"
SETUPEXEPATH="C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\"
SETUPEXENAME="SETUP.EXE"

Writing Task: Main - Microsoft Office 2003 Web Components
Path: C:\WINDOWS\system32\msiexec.exe
CmdLine:  /I C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\OWC11.MSI
CDCACHE="2" LAUNCHEDFROMSETUP="1"
SETUPEXEPATH="C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\"
SETUPEXENAME="SETUP.EXE"

Looking for setup tasks to process.
5/18/2006 11:47:34 AM  WaitForMsiExecDone...
5/18/2006 11:47:34 AM  WaitForMsiExecDone exits
Verifying install package is available
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\Purge" (Default: 0)
Value: 0
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\DeletableCache" (Default: 0)
Value: 1
SetupXml is at: C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\OWC11.xml

Parsing Download Info
Starting to load install configuration
Download Info:
Download Code     : 90A40409-6000-11D3-8CFE-0150048383C9
Source Path       : C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\
Product Code      : {90A40409-6000-11D3-8CFE-0150048383C9}
Prod Src Path     : OWC11.MSI
Use Windows Installer : false

Files to Download:
File: FILES\SETUP\OSE.EXE (OSE.EXE)
File: OWC11.MSI (OWC11.MSI)
File: FILES\PFILES\MSOFFICE\OFFICE11\1033\PSS10O.CHM (PSS10O.CHM_1033)
File: FILES\PFILES\MSOFFICE\OFFICE11\1033\PSS10R.CHM (PSS10R.CHM_1033)
File: FILES\PFILES\MSOFFICE\OFFICE11\1033\SETUP.CHM (SETUP.CHM_1033)
File: PA800302.CAB (PA800302.CAB)
File: SKU0A4.CAB (SKU0A4.CAB)
File: YB800303.CAB (YB800303.CAB)
File: ZD800301.CAB (ZD800301.CAB)
File: ZM800301.CAB (ZM800301.CAB)
File: ZQ800301.CAB (ZQ800301.CAB)
File: ZS800301.CAB (ZS800301.CAB)
File: ZY800303.CAB (ZY800303.CAB)
File: ZZ800301.CAB (ZZ800301.CAB)
File: FILES\OWC11\SETUP.INI (OWC11.INI)
File: FILES\OWC11\SETUP.EXE (SETUP.EXE_1033)
Using Office Source Engine at path:
C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\OSE.EXE
Connected to Office Source Engine.
Checking version of Office Source Engine...
Version: 11.0.5525.0

Version of Office Source Engine too low, require at least version:
11.0.8003.0
Successfully started Office Source Engine in stand-alone mode.
Reading from "C:\DOCUME~1\bradd\LOCALS~1\Temp\IXP000.TMP\SETUP.INI":
"Cache\LocalCacheDrive" (Default:  )
Value:
Error 0x800700ea
failed to determine if drive was removable: D
Error 0x800700ea
Couldn't determine what drive to cache on.
Error 0x800700ea
Failed to determine local cache information from Office Source Engine.
LocalCache has failed.  EnforceCache has been set.  Exiting...
Shutting down chained setup processing.
Set Verbose logging for subsequent setup.

***** Setup exits
5/18/2006 11:47:38 AM
(return = 234)