I will try that.
Just FYI in case it helps. When I defragmented a few times...it always says some files can't be defragmented. I lookied at the report and it appears that it is almost all of the avi files thave I have imported. Is that normal.
Not sure that has anything to do with this. For example, the file that I was able to render worked and it is in the list that did not defragment.