Um, let's see. I am using some download divx files, do you think that could be the problem?

I'm using movie clips in the video with normal .wma audio.

I'm formatting it to .wmv.

I'm not positive what the project settings are. do you mean the audio and video settings and things like bit rate and frames per second?

I think we do have some antivirus and i know we use AVG.

I can't delete some of the clips because it stops in different places. At one point, it stopped at 44% and another time it was 79%.

Hope this helps!