Thanks to astute reader Nate Coffey and Dial-a-fix, we've found another DLL registration bug.

The current version of wuaueng.dll provided to Windows 2000 service pack 4 clients has a bug in its DllInstallServer.

In the first picture is a "before" screenshot that shows that all of the SvcHost key values are here. This is a freshly installed Windows 2000 machine that only has Service Pack 4:

In this second picture, I have visited Windows Update, gotten the latest Windows Update client, closed my browser, and then unregistered the DLL using regsvr32 /u:

In this third picture, I have re-registered the DLL using regsvr32 /i, but it caused an error (0×80070057) and only one key was put back. The netsvcs key is lost at this point. In order to fix this, merge this default SvcHost key .reg file.

The error code 0×80070057 is E_INVALIDARG, or invalid parameters/arguments.

The current version of Dial-a-fix will accidentally trigger this because of the malformed DllInstallServer in wuaueng.dll. Once a new, fixed version of the Windows Update client is pushed out, Dial-a-fix will be able to help you again. I'll be filing this as a bug with Microsoft – I hope they fix it.

Edit: be sure to read Superfail part 2 for the solution for afflicted machines.

© DjLizard for DjLizard.net, 2007. | Permalink | 8 comments | Add to del.icio.us
Post tags: Fixes, Incompetence, Windows 2000, Windows Update, wuaueng.dll

Feed enhanced by Better Feed from Ozh