Try disabling any anti-virus or firewalls when burning. Make sure you have no auto downloads/updates enabled during burning.
If it happens again, before you reboot, can you check in device manager/IDE
ATA/ATAPI Controllers/(what channel you have your DVD Burner on)/Advanced Settings/Current Transfer Mode (where you have your DVD burner)........should be "Ultra DMA Mode 2"
If PIO, something else is happening.
Along with this, perhaps you can tell us a little more about your system?
Chanel your drive is on,
Jumper setting on drive,
Chanel of HD you are burning from
OS you are using,
if XP, SP update?
Burning software programs installed
Firmware of BenQ