Lenovo 3000H - Manual (Page 51)

48 Lenovo 3000H User Guide
with above method may be slightly different from the actual capacity for such reason as rounding.
5.6 Special Description of Windows
1. Keep the serial number of the software shipped with your computer in a safe place
The serial number of the software shipped with the computer is provided separately by the manufacturer;
keep it in a safe place. We will not be responsible for providing the serial number if it is missed.
2. The drivers for this model only support WINDOWS XP SP2 system.