Lenovo IdeaPad U460S User Manual page 142

If your product is not working correctly,
DO NOT RETURN IT TO THE STORE.
For technical assistance, contact a Lenovo support special-
ist 24 hours a day by calling toll free 1-877-4 LENOVO
(1-877-453-6686).
Additionally, you can find support information and updates
on the Lenovo Web site located at
http://consumersupport.lenovo.com.
* Only for the users from the United States.