title: Can't install VS2013 Ultimate or uninstall VS2012
body: <p>I've been trying to install Visual Studio 2013 for HOURS and I have no idea what to do. Every time I launch the setup I get:
  "Setup detected an issue during the operation. Please click below to check for a solution and help us to improve the setup experience".</p>
  
  <p>After that it tells me to check my CBS.log file, and I understand none of the contents, but here it is: <a href="http://pastebin.com/zQdfHW7n" rel="nofollow">http://pastebin.com/zQdfHW7n</a></p>
  
  <p>I am running Win8.1 preview.</p>
  
  <p>I've tried the following:
   - Running it as admin
   - Running it in comp. mode (WinXP, Vista, Win7, Win8)
   - Uninstalling VS2012 (but getting the exact same error)</p>
  
  <p>Someone please help! :(</p>