I've run Vegas 7 on my 64 bit system (Tyan board, 2 AMD dual core processors) since November. Everything ran fine. I recently had to reinstall Windows and Vegas will no longer run. Apparently, the runtime that Vegas uses or looks for no longer works on 64. I tried the chat line and got, "that is not a supported operating system." I would suggest a fix or a link to a version Vegas could use. I have a large project somewhat messed up
at the moment.