Need to purchase
yes of course u can change just follow these methods
First, you need to install a Spanish keyboard, and turn on the key combo to
Go to Control Panel, Clock Language and Region.
Then click on "Change Keyboard or other Input method". The Regional and
Language Options dialogue will appear.
Click on the Keyboards and Languages tab. The Text Services and Input
Languages dialogue will appear.
Under Installed Services, press the Add button, and select an appropriate
Spanish keyboard (eg Spain, Mexico, US etc).
Press Ok to add the selected Keyboard.
Now click the Advanced Key Settings tab, of the Text Services and Input
Languages dialogue. Select a key combination, to alternate between English
and Spanish keyboards (Left-Alt, Shift, by default)
Press Ok to accept changes and dismiss the dialogue.
Your Spanish keyboard should now be ready to use, once you press the
this is just the display language settings for full conversion you cannot do u have to buy a spanish version or ask your laptop assembler to put spanish version of vista hope so your problem solves with this solution