VBScript engine is unavailable after McAfee antivirus installation (4253773)

Upon trying to install/upgrade vWorkspace, the following error may be encountered:

"Can't find script engine VBScript"

This issue may also occur when attempting to install Toad for SQL Server Suite 2016 or Toad for SQL Server:

"The installer was not able to complete successfully."

Issue may be caused either by a broken VBScript registration or by McAfee antivirus.

RESOLUTION

- 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

WARNING:

Quest 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”: https://support.microsoft.com/en-us/kb/256986