missing dll?

[jopa66]

Running Windows XP Pro SP2. For some reason I recently seem to be missing
IuCtl.dll in the \System32 folder. I do not get any error messages when
visting WindowsUpdate. It takes me to the V5 page and it seems to work OK.
iuengine.dll is present in both \System32 and \dllcache. Both of these are
version 5.4.3790.2182. Also, iuctl.inf is found in \Downloaded Program Files
and does reference both of these files. (text of INF below). I guess my
question is whether IuCtl.dll is still required at the new WindowsUpdate
site? and also if other post SP2 machines are also missing this file?

The reason this is now an issue is that one of the registry scanner/cleaner
apps which I use has started to list a "severe" problem with an incorrectly
registered ActiveX control. I have tracked this down to the missing
IuCtl.dll file. This app has been run both before and after SP2 and has only
just started to identify this problem.

MSKB319585 http://support.microsoft.com/kb/319585/EN-US does list a
procedure that sort of applies, but I'm reluctant to do this as I do not
have any error messages, XP Pro is not listed, and it seems to be for the
older version of WindowsUpdate. Can anyone offer any insight or advice?

--
~john aka: jopa
---------------------------------------------------------------------------

text of iuctl.inf :

;INF file for Project1.ocx
;DestDir can be 10 for Windows directory, 11 for Windows\System(32)
directory, or left blank for the Occache directory.

[version]
signature="$Windows NT$"
CatalogFile=iuctl.cat

[DefaultInstall]
CopyFiles=install.files
RegisterDLLs=RegisterFiles
AddReg = AddRegKillBitWUV3IS

[RInstallApplicationFiles]
CopyFiles=install.files
RegisterDLLs=RegisterFiles

[DestinationDirs]
install.files=11
[SourceDisksNames]
1=%DiskName%,IuCtl.CAB,1

[Add.Code]
iuctl.dll=iuctl.dll
iuengine.dll=iuengine.dll

[install.files]
iuctl.dll=iuctl.dll
iuengine.dll=iuengine.dll

[SourceDisksFiles]
iuctl.dll=1
iuengine.dll=1


[iuctl.dll]
file=thiscab
RegisterServer=yes
clsid={9F1C11AA-197B-4942-BA54-47A8489BB47F}
DestDir=11
FileVersion=5,4,3790,14

[iuengine.dll]
file=thiscab
RegisterServer=no
DestDir=11
FileVersion=5,4,3790,14
[RegisterFiles]
%11%\iuctl.dll

[AddRegKillBitWUV3IS]
HKLM,"SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{CEBC955E-58AF-11D2-A30A-00A0C903492B}","Compatibility
Flags",0x00010001,0x00000400