Solution Windows Vista doesn't always register the VBScript run-time interface. At first find out where vbscript.dll is. The typical location is in C:\Windows\System32. Next you need to go to Start > All Programs > Accessories and then right click on Command Prompt and select the menu "Run as administrator". In the command prompt self enter following commands: $ cd C:\Windows\System32 $ regsvr32 vbscript.dll The command regsrv32 should confirm that the VBScript has been registered. After successful completion of this action, the installation should work.