Hmmm- it seems DD doesn't like some DVDs- the DVD I tried demux function on is The Best of Friends Vol4 - R1 . It still doesn't rename file to include time delay but correct time delay can be found in StreamInfo file. Also it seems that every time it finishes demuxing that file it goes restarting my PC "the hard way". I can reproduce this error any time. My system is Athlon 2000+, Asus A7V333, 512Mb DDR, DVD-ROM LiteOn HD-166S, WinXP+SP1. I never noticed this kind of behaviour but now that I tested a few more DVDs- it seems that when ending decrypting some of the DVDs DvdDecrypter tends to restart my PC. It usualy happens when using Demux function and on some DVDs only. P.S. Just talked to my friend who has pretty much simmilar PC configuration and he advised me that sometimes he experiences random restarts too. Is it possible that DD is calling some function that restarts system? P.P.S. OK- it seems I can definetly reproduce restart error on decrypting that DVD. On other DVDs it seems more or less random. In the mean time I also tried both ASPI and SPTI mode and experienced restarts all the same.