I have nearly the same problem. I was going to start a new thread to ask for help but this seems so similar that I will post here first I guess.
I had been using NeroVision to make Single Layer DVD+R s using ripped .vob files produced from AnyDvd/Clone DVD mobile software from Slysoft. This worked great in allowing me to create custom dvds that start cartoons and such right away and with menus that I can work "blind" from the front seat of the car while the kiddo watches them in the back. It also is nice to have backups for use in the car, instead of scratching up the really expensive Disney ones...
Anyway, like a fool, I did not follow the "if it aint broke dont fix it" rule and upgraded from nero ultra 22.214.171.124 (with whatever version of nerovision that was) to the nero ultra enhanced that came out a few days ago and now I have Nero Vision 126.96.36.199
Nero Vision will usually not make it past transcoding the vob files. Sometimes I get a error box (with a copy text option button) but with no text in it! Other times I get a small box with no buttons that simply says error 103. Yet other times I get the thing just going and going and going and doing nothing but running the time elapsed counter to infinity. Mostly however, it just up and exits the program with no warning or errors right in the middle of transcoding. Poof. On the rare occasion that it makes it to the actual disc burn - I have no trouble.
I have done everything but reinstall windows. Clean tool , registry clean tool, the works. I have the same problems even clean reinstalling to my former good config.
The only other strange thing was that itunes now nags me that its ripping/burning drivers are now hosed and that I should reinstall itunes. I assume the Reinstalls of Nero did that somehow, but since I dont rip or burn with itunes, I have just ignored it for now.
This is driving me nuts... any help?