http://lenovo.techbuddiesonline.com/2012/03/lenovo-laptops-restore-factory-settings.html

Detailed Operation Procedure

1. Repeatedly press and release the F11 or F2  key once turning on the computer until the Lenovo Rescue System open, then select OneKey Recovery.

Note: System Recovery will overwrite all of the data on the C: drive. To prevent loss of data, be sure to back up relevant data before performing system recovery.

2. Follow the on-screen instructions to select the backup task you want to restore from and the disk where you want to install the operating system, then press Next to start the restore.

3. Please wait during the process of system recovery. Do not interrupt the operation during the recovery process.

4. After the system is recovered successfully, the software will prompt you to restart the computer. Restart the computer and start the operating system.

 


For the Lenovo k330 it does not have a special recovery key instead you press the F2 key during system boot to activate OneKey Recovery. You can then chose manual or automatic system recovery.


Press f11 rapidly after starting.

http://www.youtube.com/watch?v=j7G93cWDVqo