It doesn't matter which conversion program I use, my PC freezes up during conversions,  Sometimes it is very early in the piece and sometimes as much as 60% to 70% has completed, which is really annoying because none of it appears in the conversion folder until 100% has completed, meaning the time and effort was wasted. If anyone can suggest what and why this may be happening I'd be most pleased as I have family awaiting their videos. TIA, Mark.