I am thinking this is the issue. This video I'm working on is very large and has a ton of cuts, and it takes my computer a good 2 minutes to load it all. Once it's loaded the program lags a bit.

Everything is the same I have used for a while... using .wmv and rendering as .wmv, default template. Only difference is the large amount of footage I'm using.

For a while I was getting this message every time I tried to render. I made the project file smaller by deleting some clips, and I was able to render about 1/4 of the video. Perhaps I will do this a few times and then edit those rendered videos together.

Appreciate the help.