title: How do I install SQL Server 2008 Express R2 SP1 to an existing R2 Express instance?
body: <p>Windows update on my Windows 7 64 bit system says I have an optional update available, Microsoft SQL Server 2008 R2 Service Pack 1 (KB2528583). When I try to install it through Windows update, it hangs. I try stopping the installation, and that hangs as well. I have to do a full restart to clear this up.</p>
  
  <p>I then went to the KB doc, and it leads me to:</p>
  
  <p><a href="http://www.microsoft.com/download/en/details.aspx?id=26729" rel="nofollow">http://www.microsoft.com/download/en/details.aspx?id=26729</a></p>
  
  <p>I download SQLEXPRADV_x64_ENU.exe.</p>
  
  <p>When I start it up, I'm not sure how I update my existing installation of R2? It wants to do a new installation, which looks like I would have to migrate all my DBs into the new instance it creates.</p>
  
  <p>Does anyone know how I can get this installer to update my existing R2 to SP1 in place? Just update my existing instance. Should I do a repair instead?</p>
  
  <p>Thanks for your help,
  Rich</p>