i just got my new laptop Lenovo Y400 28A preloaded with Vista Home Basic.

Problem found:
1. Unable to play DVD movie.
2. Can't detect my WIFI access point
3. A lot of program are not running well

For this, i already decided to get back to Windows XP.
but i search through MS web and found that there is no downgrade right for Vista Home. it's such a waste to have preloaded OS which is almost useless.

Anybody can tell me how to do?

Thanks for your comment.
The home basic is "preloaded" with the Laptop as i mentioned. Not my choice.

"Downgrade rights are an end-user right and are documented in the product end-user license agreement (EULA) and refer to the ability of your customers to acquire the most recent version of Microsoft(R) software but continue to run a previous version until they are ready to upgrade."

You can refer to the following or find it from Microsoft.
http://www.nor-tech.com/vista/vistadowngraderights.htm

Well, i'm not a english educated guy, maybe some of my grammer are wrong!
So beside checking on my grammer mistake, anybody else got experience can help on how to switch back to XP? i think i got no choice but to give up the vista license.