I am running the latest build of Vegas Pro 12 and have the latest video drivers installed. If I start a new project and import video (mov, mpg2, or mpg4) or stills (jpg) the program hangs and gives me the message "not responding." I have to restart and the same thing happens again. I can import audio (wav) files and drop them into the timeline and Vegas seems to be OK with that. However, I need to do video editing. This just started happening 3 days ago. I tried uninstalling and reinstalling but no improvement. Any suggestons?