Lenovo ThinkCentre E73 Hardware Maintenance Manual page 179

Obtaining device drivers
You can obtain device drivers for operating systems that are not preinstalled at
http://www.lenovo.com/support. Installation instructions are provided in readme files with the device-driver
files.
175
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Chapter 10 Replacing FRUs (machine types: 10AU, 10AW, 10BF, and 10BG)