Hi Marcial, I am Rob, an independent and a 10 time and dual award MVP specializing in Windows troubleshooting and Bluescreen analysis. Please remember as independents we are not responsible for the development of Windows or the computer hardware and drivers. If you will work with me I will be here to help until the issue is resolved.
Most Wi-Fi devices provided my manufacturers on their systems today are built into their motherboards.
For more specifics about your model you will need to contact Acer.
Acer - USA - Service and Support - Drivers
http://us.acer.com/ac/en/US/content/support
Acer - Community/Forums
Acer - Worldwide
http://www.acer.com/worldwide/
Please let us know the results and if you need further assistance. Feedback definitely helps us help all.