Restart the computer

Just check to make sure that the CD-ROM drive has all its cords properly attatched. It sounds like there is either a driver conflict of some sort or a power failire in your system causing the BIOS to restart the machine. Check all power cables and if you recently updated the driver to the drive, roll it back. If your problem is still not sorted, try disconnecting the floppy drive or something from the mother board and power, see if the power supply is being overloaded. Or, you may need to simply purchase a new CD-ROM drive, would probabaly be your best bet.