The actual capacity of a marked capacity of 40G is 40 x 1000 x 1000 x 1000/ (1024 x 1024 x 1024) = 37G. If there is a 3G hidden partition, which is actually 3 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 2.79G, you can get the capacity that is shown in Windows by minus 2.79G with 37G. Due to the rounding of minor numbers in calculation, there might be a slight discrepancy between the actual value shown in the system and the calculated value.
4.6 Special Notes on Models
Keep the serial number of the supplied software in a safe place
Please keep the serial number of the software in a safe place. This is a special number provided by the developer. There will not be any replacements provided if the original serial number is lost.
The drivers of this model only support WindowsXP SP2 system.
28Lenovo 3000 H Series User Manual