RESOLUTION 1
As a security measure, Windows Installer will not load script engines registered in HKEY_CURRENT_USER.
As a user-writable store, a normal user could get an elevated install to run their library masking as a script engine if the custom action was not explicitly attributed with msidbCustomActionTypeNoImpersonate (0x0800).
This is an elevation of privileges attack; thus, Windows Installer returns error message 2738 or 2739 for custom actions type 6 and type 5, respectively, and returns Windows error1603, ERROR_INSTALL_FAILURE.
Check that vbscript.dll and jscript.dll aren't registered in HKEY_CURRENT_USER (HKCU), checking for the registry keys below.
VBScript, HKCU\SOFTWARE\Classes\CLSID\{ B54F3741-5B07-11CF-A4B0-00AA004A55E8}
JScript, HKCU\SOFTWARE\Classes\CLSID\{ F414C260-6AC0-11CF-B6D1-00AA00BBBB58}
Remove these keys if they exist in HKEY_CURRENT_USER.
Also be sure that if you need to re-register vbscript.dll or jscript.dll, you run regsvr32.exe in an elevated console on Windows Vista and newer with UAC enabled; otherwise, you'll end up registering the runtimes in HKCU.
RESOLUTION 2
- Open a command prompt in elevated mode (run as administrator).
- Type "regsvr32 vbscript.dll"
- Open regedit and verify that HKLM\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32 is pointing to vbscript.dll
On a 64-bit machines the key is HKLM\SOFTWARE\Wow6432Node\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32
There's a specific scenario when the key is overwritten by McAfee software, which change the key's value to McAfee script scanning DLL. In such a case please either uninstall McAfee then re-register vbscript.dll or contact McAfee support.
It's also possible that the same key may exist in HKCU hive.
Please delete the whole HKCU\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8} tree in such case.
Additional workaround: Please remove traces of McAfee using MCPR tool:
http://service.mcafee.com/FAQDocument.aspx?id=TS101331
***Windows Registry Disclaimer***
Quest Software does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.
