Erase a CD or DVD
Certain kinds of writeable CD and DVD discs can be erased and written to many times. If you have a CD-RW, DVD-RW, DVD+RW, or DVD-RAM disc and you use the Live File System file format, you can delete one or more files to make more room on the disc.
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Insert the CD-RW, DVD-RW, DVD+RW, or DVD-RAM disc into your computer's CD or DVD burner.
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Open Computer by clicking the Start button 
, and then clicking Computer.
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Click the drive icon that represents your writeable drive, and then, on the toolbar, click Erase this disc.
Follow the steps in the Erase Disc Wizard.
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Insert the CD-RW or DVD-RW disc into your computer's CD or DVD burner.
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Open Computer by clicking the Start button , and then clicking Computer.
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Double-click the drive icon that represents your writeable drive. The contents of the disc will be displayed.
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Select the files or folders that you want to delete.
To select more than one file, hold down the CTRL key while you click the files you want.
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Press the DELETE key.
