Error 2738 Installation, could not access VBScript run time for custom action

If the Technical Solution below didn't fix the issue, you can delete the relevant registry entries and re-register the dll.

http://usa.autodesk.com/getdoc/id=TS15102758

Please make sure you backup the registry/system before you make any changes to the registry.

To delete the registry keys, please run following commands in a command prompt with elevated privileges. Please check out this reference post as well:

http://upandready.typepad.com/up_and_ready/2012/03/general-systems-windows-7-administrator-tips-tricks.html

On Windows 7 64 bit System

reg delete "HKCU\SOFTWARE\Classes\Wow6432Node\CLSID\{B54F3741-5B07-11CF-A4B0-00AA004A55E8}" /f

reg delete "HKCU\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11CF-A4B0-00AA004A55E8}" /f

On Windows 7 32 bit

reg delete "HKCU\SOFTWARE\Classes\CLSID\{B54F3741-5B07-11CF-A4B0-00AA004A55E8}" /f

To re-register the DLL, please run following commands with elevated privileges:

On Windows 7 ~ 64 bit system

c:\windows\syswow64\regsvr32 vbscript.dll

c:\windows\system32\regsvr32 vbscript.dll

On Windows 7 ~32 bit system

c:\windows\system32\regsvr32 vbscript.dll

Certain Anti-Virus programs have been known to affect the registration of the dll. Please check out the the notes below:

If you had McAfee Anti-Virus in the past (even if you have unistalled it will leave some trace components on the computer), please use this tool to remove it completely:

http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

If you had Avast Anti-Vvirus program in the past (and you have installed it), please read the instructions to completely uninstall it here.

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Epilogue

1. Search in the registry for the following value: {B54F3741-5B07-11cf-A4B0-00AA004A55E8}

2. Back up any key with that value then delete it. i.e. Backup: File > Export. When deleting the key, there maybe an error and the key will not delete. You will need to go into each folder to ensure that the folder is empty and hit F3 to search again.

3. Repeat steps 1 & 2 until there are no more entries for {B54F3741-5B07-11cf-A4B0-00AA004A55E8}.

4. We needed to completely uninstall McAfee Anti-Virus using the MCPR.exe because the InprocServer32 value for (Default) was set to "McAfee'. i.e. C:\Program Files\Common Files\McAfee\. The default value for InprocServer32 is below:

NOTE: You may need to research how to cleanly uninstall your flavour of Anti-Virus software.

5. Re-register the DLL:

On Windows 7 ~ 64 bit system

c:\windows\syswow64\regsvr32 vbscript.dll

c:\windows\system32\regsvr32 vbscript.dll

On Windows 7 ~32 bit system

c:\windows\system32\regsvr32 vbscript.dll

6. Once you have cleared the registry settings and uninstalled the Anti-Virus software cleanly, then you will be able to install the software without a 2738 error.