I use my q6600 quad core w 4gigs ram and xp pro to convert my dvds to divx using fair use wizard 2.8 codec 6.83. I first rip the disc to an iso. I use Anydvd and DVDshrink to reauthor to main movie. I do this to take movies with me on my laptop. Since I have the capabilty I have been converting up to 4 ISOs at the same time. I have noticed that the movies get extremly fuzzy and blurred in parts. Am I creating these issues encoding more than 1 divx file at the same time?
I would not think so. I encode, search the net, stream video,...ect. all at the same time, I have never had an issue like that. To test it, re encode one of the blurry movies without doing anything else on your computer, and see what you get.