I have the same problem with 1Click DVD Copy 5 and with Roxio Creator DE which came with my computer. I will try ImgBurn and see if this helps. It seems to be a problem that only exists when burning DVDs. I need to have good speed control and auto speed regulation to be able to burn at a reduced speed.
I downloaded the ImgBurn software and was able to burn an error-free DVD, however, I noticed that the speed started slow and increased to 10x. Then, in the middle, of the DVD burning process, the burning paused because the buffer became empty. When the buffer became full again, the burning continued and worked up to 10x again.
The buffer default sizewas 40 MB. Would it help this problem if I increased the buffer size to 160 MB? I would like to burn at a faster speed if possible.