This error message indicates that the VBScript engine is not currently registered on the machine where the install/uninstall is taking place.
How do I fix error code 2738 on Windows 7?
The approach for Windows Vista is quite possible under 64-bit Windows 7:
Why does Windows Installer return error message 2738 or 2739?
This could be a privilege escalation attack; As a result, Windows Installer returns error 2738 or 2739 for type 6 and type 5 user-defined policies, respectively, and therefore returns Windows error 1603, ERROR_INSTALL_FAILURE. Make sure vbscript.dll and jscript.dll are not included in HKEY_CURRENT_USER (HKCU) and look for most of the following registry keys.
What is install error 2738?
Could not access a VBScript runtime appropriate for the custom action. This error usually occurs on the system during a fresh installation of 3CX Phone System because Visual Basic Script (VBScript) is not installed or even disabled, or some registry keys on the computer are incorrect or corrupted.
How do I fix error 2738?
Solution for Windows Vista or Windows 7 64bit:
Why is there an error 2738 on my computer?
Here are some of the easy and proven ways to fix 2738 problems on your PC yourself: If you encounter error 2738 due to incorrect VBScript registration, follow these steps to resolve it. Go to our own start menu, open Run, type more RegEdit in the box, but click OK. This will open the Windows Registry Editor wide open.
Why is there an error 2738 in 3CX?
Error 2738: Unable to access custom action VBScript runtime. This error usually occurs on the system when installing the Visual 3CX Phone System, because the base script (VBScript) is not installed or disabled, or some PC keys are incorrect or corrupted.
Why do I get error 2738 when uninstalling MacAfee?
Sometimes error 2738 can occur when your family uninstalls the MacAfee antivirus software that comes preinstalled on your system. Removal usually leaves traces of certain components in the registry. These components must be completely removed or you may still see error codes like 2738 on your computer screen.

Vijay is a tech writer with years of experience in the Windows world. He’s seen it all – from simple problems to catastrophic system failures. He loves nothing more than helping people fix their PCs, and he’s always happy to share his wisdom with anyone who needs it.
When Vijay isn’t fixing Windows problems, he likes to spend time with his wife and two young children. He also enjoys reading, playing cricket, and watching Bollywood movies.