title: ComObject Excel.Application without Office Suite
body: <p><br>
  I need to read an Excel file from Powershell.<br>
  I am using this object:<br></p>
  
  <pre><code>$objExcel=New-Object -ComObject Excel.Application
  </code></pre>
  
  <p>It is working fine on a machine with an Office installation but if Office is not installed, I get this error:</p>
  
  <pre><code>Retrieving the COM class factory for component with CLSID {} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
  </code></pre>
  
  <p>Is there some <em>runtime environment</em> for Office to use?</p>