title: OpenAs_RunDLL in Vista
body: <p>This isn't strictly a programming question, but hopefully someone here has the knowledge to help me.</p>
  
  <p>Running Vista x64, the "Open File With" dialog takes forever to appear when trying to open a file with unknown type.</p>
  
  <p>To be specific, the prompt giving the choice between "Use the web service to find the correct program" and "Select a program from a list of installed programs" appears immediately, but there is about a 10 second delay between pressing OK here and the next window (with a list of installed programs) appearing.</p>
  
  <p>The same delay is present when I run "rundll32 shell32.dll,OpenAs_RunDLL" from a command line.</p>
  
  <p>I'm guessing that this is not common behaviour, because I find it incredibly annoying, and I couldn't find any mention of it anywhere.</p>
  
  <p>So..does anyone have any ideas what it might be?  Or what I could do to try and find out?</p>