title: Difficulty installing MVC 3 after uninstalling MVC 4 RC
body: <p>Started a new project recently and planned to use MVC 4. Made the mistake of installing MVC 4 RC without installing MVC 3 first.</p>
  
  <p>After reading about issues other users have had, uninstalled MVC 4 and tried to install MVC3.</p>
  
  <p>I Used the platform installer to install MVC 3 but repeatedly ran into some error message about some part of MVC 3 failed to install (details report of platform installer was not helpfull).</p>
  
  <p>I uninstalled and re-installed Visual Studio 2010 Enterprise, and attempted to install MVC 3 twice. Second time just to show someone else the error.</p>
  
  <p>I tried installing a 3rd time so I could copy the error to Stack Overflow for insight.</p>
  
  <p>Shockingly, this time success.</p>
  
  <p>On the one hand I'm glad to have a "successfull" install, on the other hand I'm nervous that something may still be amiss.</p>
  
  <p>I know I'm not giving much to go on, but I was wondering if anyone else has run into this sequence or type of problem? I know Microsoft developers watch this site. Can anyone point out any other steps that may be needed to "clean" MVC 4 RC from my environment?</p>