title: Install vcredist_x64.exe on install of VS 2015 installer Project
body: <p>I have a msi installer project in VS 2015, and I have MSI dependency on vcredist_x64.exe (Redistributable package 2015). I am trying to install the pre-requiste with launch condition in installer project. But somehow the launch condition is always turning to be true so every time I click the installer it shows dialog to install vcredist_x64.exe every time even if its installed. The launch condition for windows installer project is as below snap 
  <a href="https://i.stack.imgur.com/iWWvl.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iWWvl.jpg" alt="enter image description here"></a></p>
  
  <p>and the launch condition is like below 
  <a href="https://i.stack.imgur.com/Ofpcq.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ofpcq.jpg" alt="enter image description here"></a></p>
  
  <p>Can anyone help that kind of condition can be applied So that it installs prerequisite only if its unavailable<a href="https://i.stack.imgur.com/d6KWU.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/d6KWU.jpg" alt="enter image description here"></a>. </p>
  
  <p>I have also tried adding with custom actions but that also does not work well and shows error as both MSI installer output exe and vcredist_x64.exe runs at same time, and any help is appreciated </p>