Sony VAIO VGN-UX100 Series User Manual page 160

What should I do if I cannot write data to DVD-RAM media using Windows functions?
Follow these steps to change the settings:
1 Click Start and then My Computer.
2 Right-click the optical disc drive icon and select Properties.
3 Click the Recording tab.
4 Click to cancel the Enable CD recording on this drive check box.
5 Click OK.
!
Canceling the Enable CD recording on this drive check box disables writing data to CD-R and CD-RW discs. To write data to such discs, make sure to
select this check box.
You cannot add data to DVD-RAM discs with data already written by the Roxio DigitalMedia software due to difference in disc formatting. Attempt to
add data to such a disc will re-format the disc, resulting in loss of the entire written data.
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Troubleshooting