How to reset a Lenovo laptop Windows 7 to factory settings without the disk/CD? - 1
How to reset a Lenovo laptop Windows 7 to factory settings without the disk/CD?
Sparkle
Call Windows Helpline Toll Free:-@+ 1-866-350-0239! 
phinch
Contact the MFG, and buy a new one.
Mikel
You can't do it without CD.
Download Linux Mint Mate - if you want a new experience
Prayag
You can access the hidden partition on the hard disk where an image of the factory original boot drive can help you.
Or you can download a bootable version of your OS onto a DVD or USB flash drive.
Starrysky
To get better solution search in www.google.com
Bablu