This was a problem reported by an an ADN Developer. The solution was also provided by the ADN developer:
If system administrators implement the policy described by Microsoft in http://support.microsoft.com/kb/2264107 and set CWDIllegalInDllSearch to FFFFFFFF, the AutoCAD 2013 installer will fail being unable to load LiteHtml.dll
You need to detect the bad registry setting and warn people that they need to undo it.
The following .reg file causes the problem:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]
"CWDIllegalInDllSearch"=dword:FFFFFFFF
This following .reg file fixes it:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]
"CWDIllegalInDllSearch"=dword:00000000

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