I installed nero 7.5.1.1 (Nero7 Ultra) silently (on MS virtual pc2007) by using methods quoted here using the switch /qn /norestart SERIALNUM_USERVAL="xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx" in the original installer. installation went fine, but showed two errors Unable to register C:\Program Files\Ahead\Lib\NSG_dxFilter.dll. Error code 21 The speciFied module could not be Found, ERROR = 126 FACITLITY = 7 and Unable to register C:\Program Files\Common es\Ahead\Lib\Nero3DMenuEFFects. dll. Error code The speciFied module could not be Found. ERROR = 126 FACITLITY = 7 If someone can help with the problem Thanks in advance