Computer manufacturers affix serial numbers to each unit they produce to identify any unit in question. The serial number helps identify what hardware is inside the computer and what kind of software is necessary to make that hardware function properly. The serial number also helps manufacturers keep track of which version of Windows, as well as which Windows build number, was preinstalled on the computer. And, most important, a serial number is vital when identifying a unit that may have been stolen. For these reasons, users should never remove the serial number from their unit.

1. Go To START and Press RUN

2.Write it ( cmd )

3.Now Write ( wmic bios get serialnumber )

click for your model Pc or laptop to find your driver

DELL

ASUS

HP /HP COMPACT

LENOVO

SONYVAIO

 ACER

TOSHIBA