I have just found, that there are serious problem with NEC-4551 after installing Zone Alarm Pro 6.1.744.000.
What I have observed:
- I was burning Veratim DVD+RW disc with Nero 126.96.36.199
- after burning Nero was to able to read the disk and burner seemed to be hanged up - I tried several times with the same efect
- I tried burning TDK DVD+RW disc and there was problem
- then I have disabled Zone Alarm Pro and burned Verbatim once again - and everything was fine!