Sony VGN-TX750P - Manual (Page 167)

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Troubleshooting
What should I do if I cannot write to DVD-RAM using Windows functions?
This Q & A entry applies to selected models only. See the online Specifications to see whether your model is equipped with
the DVD±RW/RAM drive.
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 to CD-R and CD-RW discs. To write 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.