Toshiba Portege 4000 User Manual page 216

216
If Something Goes Wrong
WinDVD problems
3 Open the CDROM device folder, select your DVD-ROM
device driver, then click Properties.
4 Select the Settings tab, click the DMA check box, then click
OK.
The system must be restarted for this setting to take effect.
The "Root" or "Title" menu does not open.
Most DVD titles have one or both of the "Root" and "Title"
menus. If one menu button appears to do nothing, try the other
menu button.
WinDVD performance decreases after making a system
change.
DVD playback performance is dependent upon several system
resources. Some software changes may also impact playback
performance (for example, downloading new drivers from the
Web).
Before installing a new hardware or software component on your
system, check for any potential conflicts between its resource
requirements and your current system configuration. Also, if you
change your operating system, check with your PC manufacturer
to ensure that you have the appropriate drivers for both your
hardware (for example, the graphics card) and software (drivers
must support the operating system and DVD with WinDVD).
Slow playback performance.
DVD playback is a resource intensive application. Other
applications and/or changes to your system hardware, software or
configuration can impact playback performance. If playback is
slower than normal, try the following:
1 Close any other open applications to improve the performance
of the DVD playback.
2 Ensure DMA is turned on. For more information, see
"General issues" on page 215.