title: there has been an error , unable to write inside TEMP environment variable path
body: <p>while i install postgresql ,there has been an error there has been an error , "unable to write inside TEMP environment variable path"</p>
  
  <p>I looked at bitrock_installer.log and it shows:</p>
  
  <blockquote>
    <p>Log started 10/16/2018 at 15:39:49 Preferred installation mode : qt
    Trying to init installer in mode qt Mode qt successfully initialized
    Executing cscript //NoLogo
    "C:\Users\Propc\AppData\Local\Temp\postgresql_installer_e1e7f98092\prerun_checks.vbs"
    Script exit code: 1</p>
    
    <p>Script output:  Input Error: There is no script engine for file
    extension ".vbs".</p>
    
    <p>Script stderr:  Program ended with an error exit code</p>
    
    <p>Error running cscript //NoLogo
    "C:\Users\Propc\AppData\Local\Temp\postgresql_installer_e1e7f98092\prerun_checks.vbs":
    Program ended with an error exit code</p>
  </blockquote>