I installed Premier Pro CS6 last week, so I believe it's the most updated version. This is my first project with CS6. The file is a .MTS AVCHD video. The video & audio play just fine in Windows Media Player.
When I started the project I imported the file and no audio was transferred in the preview or on the timeline. I have an intel Core HP Pavilion Entertainment PC with Windows 7. I was running Spotify, Chrome, & Microsoft Word when I imported the footage.