The source DVD has too many errors or the source DVD drive has aged and you need to replace it. But first try the CD/DVD lens cleaner. However I find most owners reluctant to swap out a DVD drive or recorder to sort out the problem. My solution is to wait until they have tried all other avenues as well as reloading the OS and more a dozen times and then they cave in and replace the bad source DVD media or drive.
It is that simple.
I'm using an e-machine model #T2862, windows xp home ed. I've been using dvd shrink 3.2, 1click dvd and I'm using a Sony burner DRU-71A. From time to time I've had problem with the d drive reading, now both pieces of software has stopped working. When I use dvd 3.2 shrink I get a message saying "Invalid navigation structure" on the 1 clik dvd I get an error message saying "VTS 02 0.1FO contains bogus data" I see this message when the movie is finalizing. Also when I installed my burner I did not use the Sony cable to connect the burner I used the one that came with the system, should I change the cable?