Using Instant Mode; Support Formats - Sony VAIO VGN-TX850P Supplementary Manual

Using Instant Mode

Instant Mode enables you immediately to play CDs and DVDs without
launching Windows. To activate Instant Mode, your computer must be off.

Support Formats

In Instant Mode, you can play optical discs in the following formats.
CD
DVD
4
Audio CD
Commercially available DVD, DVD-Video format,
DVD-VR format