Installing Windows Critical Update From April 4, 2007 Causes Serv-U Administrator to Crash
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On April 4, 2007, Microsoft released a patch for the Windows operating system to fix a vulnerability relating to animated cursors. This patch updates a Windows system file (hhctrl.ocx) with a version that can cause conflicts with another Windows system file (user32.dll). Because of this potential conflict, certain applications (including the Serv-U Administrator) may not run properly. Instead, they will display the following error when started:
The system DLL user32.dll was relocated in memory. The application will not run properly. The relocation occurred because the DLL C:\Windows\System32\Hhctrl.ocx occupied an address range reserved for Windows system DLLs. The vendor supplying the DLL should be contacted for a new DLL.
Microsoft has acknowledged that this is a flaw with their recently released patch. In response, they have made a hotfix available that must be installed on affected computers to correct the error. This hotfix can be downloaded at the following URL:
http://support.microsoft.com/kb/935448
NOTE: While the Microsoft KB article linked above mentions this as a problem with the Realtek HD Audio Control Panel, in actuality it is a problem with many different applications. The hotfix corrects the underlying error that is causing the problem, regardless of the specific application.
After installing this hotfix, you should no longer encounter this error.