title: Installing SQL Server Express 2005 - but it already exists on the machine
body: <p>I built an application for a client that requires SQL Server 2005 Express.  Everything worked fine on all the machines except for one.  On this one they already had an application that uses SQL Server Express, so it was already installed on the machine, but nobody knows which application uses it or any usernames/passwords.</p>
  
  <p>Can I simply install another copy into a different folder?  This just doesn't seem right to me, and I know this has to be a common scenario.  Can someone point me in the right direction on how I should proceed?  </p>
  
  <p>Thanks!
  Darvis</p>