Lenovo ThinkPad T420 (English) User Guide - Page 33
Certificate of Authenticity label - keys replacement
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If no integrated wireless PCI Express Mini Card has been preinstalled in your computer, you can install one. To do this, follow the procedure in "Installing and replacing a PCI Express Mini Card for wireless LAN/WiMAX connection" on page 130 or "Installing and replacing the PCI Express Mini Card for wireless WAN" on page 137. Certificate of Authenticity label The Certificate of Authenticity label for the preinstalled operating system is attached. Printed on this label are the product ID and the product key information for your computer. Record this information and keep it in a safe place. You might need these numbers to start your computer or reinstall the operating system. Chapter 1. Product Overview 15
If no integrated wireless PCI Express Mini Card has been preinstalled in your computer, you can install
one. To do this, follow the procedure in “Installing and replacing a PCI Express Mini Card for wireless
LAN/WiMAX connection” on page 130 or “Installing and replacing the PCI Express Mini Card for wireless
WAN” on page 137.
Certificate of Authenticity label
The Certificate of Authenticity label for the preinstalled operating system is attached. Printed on this label are
the product ID and the product key information for your computer. Record this information and keep it in a
safe place. You might need these numbers to start your computer or reinstall the operating system.
Chapter 1
.
Product Overview
15