HP Notebook PC - Manual (Page 29)

Basic
Operation
Using CDs or DVDs
Using CDs or DVDs
To play DVD movies
If your notebook came with a DVD, or other readable drive, it also includes
DVD player software that lets you play DVD movies.
Select Start > All Programs > Multimedia > DVD Player > InterVideo WinDVD.
NOTE: DVDs can have regional codes embedded in the disc data. These codes
prevent DVD movies from being played outside the region of the world in which
they are sold. If you get a region code error, you are trying to play a DVD intended
for a different region.
Most DVD drives let you change the region code only a limited number of times
(usually no more than 4). When you reach this limit, your last change to the region
code will be hard-coded on the DVD drive, and will be permanent. Your warranty
does not cover the expense of correcting this situation. Refer to the help
for your DVD player software for details about setting region codes.
Startup Guide 21