Sony PCV-RS730G - Manual (Page 110)

About Media Center
The Microsoft ® Windows ® XP Media Center Edition operating system is not installed on all VAIO Digital Studio ® computers.
See your online specifications sheet for more information about your computer's configuration.
Why doesn't the REW button on the remote control work when I use My Music?
The REW button does not "rewind" music files. Instead, press Replay on your remote control for a similar function.
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