I have had sony vegas 7 since Christmas and it has worked fine and I have made many movies with it. Just last week I tried to render a movie as .wmv (like i always do) and it rendered to about 5% and then an error message popped up saying that I needed to close out. I went back and tried to save it as other types of video formats like .avi and .mpg4 but the error message still pops up. Sometimes a different message come up saying that my virtual memory is low, and when i close out of sony vegas 7 my computer's memory is normal.
here is a screenshot of my problem.