Updates stopped working

OK Auto Update stopped working (I'm running Windows XP professional x64
edition)
I also noticed that when I select properties on "My Computer" I get the error
"This application has failed to start because WINHTTP.dll was not found.
Reinstalling the aplication may fic the problem"

So I tried every thing I can find here to fic the bits problem including
down loading the following

Windows-KB890830-V1.21.exe
WindowsXP-KB842773-v2-x86-enu.exe

One to reinstall Upate and one to fix BITS and WinHTTP.

When I try to run either of the above I get the following error dialogue: -

Extraction failed

The system cannot find the file specified.

I'm assuming that they (the KB fixes) are trying to run using update.exe.

So how do I install a fix that useses the thing thats broken to run the fix?
Catch 22 maybe.

I can not start the bits service as I get the following error in Eventlog

Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7023
Date: 16/11/2006
Time: 21:02:33
User: N/A
Computer: NEWTOY
Description:
The Background Intelligent Transfer Service service terminated with the
following error:
The specified module could not be found.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

I also get the following errors (discovered while strying to reregister some
dlls)

regsvr32 wuaueng.dll - gives the following error -

LoadLibrary("wuaueng.dll ") failed - The specified module could not be found

The dll is in system32 (version 5.8.0.2469 built by 5.8.0.2469 built by:
lab01_n(wmbla))

I also get the same error (with "qmgr.dll" in the braces) when I run: -

regsvr32 qmgr.dll

Can you help please?