Hi Kevin, Sorry, my earlier reply was really rushed, as I was with a client. Here is the full story. I'm on win8.1 PC. It's a fairly old CPU (i7 920), but kitted out with 24GB of RAM, GTX 560 DirectCU II 1.5GB and SSDs, too. It runs projects up to 8x 45mbit DSLR multicam just fine. Recently, I installed the Razer audio controller, which mounts a virtual speaker output on the PC (it installed itself alongside some Steam game). There was no issue whatsoever. The other day, I uninstalled it and that's what broke Premiere! Literally every time I'd bring the focus back to Premiere CC from any otehr app, even from the desktop, it would stagger for 5-10 seconds before anything was clickable. Scrobbling through the timeline was impossible, etc. Also, the application had the old audio hardware entries in the Audio Hardware section of settings. Changing them prompted the audio sync warning. Prompted by the top answer in this thread, I figured it out and re-installed Razer's speaker driver/emulator. After a restart, Premiere started running as normal! Woohoo best wishes, Mike
... View more