Error 1720: “There is a problem with this Windows Installer package. A script required for this install to complete could not be run.”
Error 2738: “Could not access VBScript run time for custom action.”
Both errors could be caused by the following: occasionally, system problems can erroneously unregister one of the essential Windows components: Windows Script Host.
Solution
You need to re-register vbscript.dll. To do so, execute the following command (you may want to consult your system administrator before doing so):
Regsvr32.exe C:\windows\system32\vbscript.dll