Well, this is what happens. When I try to convert the movies into DVD with my laptop, the size of the movies is less than that that convert with my desktop. For instance, the movie is 600 MB. After the conversion with my laptop, it is around like 4.0 GB. However, with desktop, the file is 6.0 GB. My question is how come? I just use the same software winavi to convert the movie but with different use of computer. But the result is vastly different.