Hi, Evandro:
There is no support or drivers listed on your model's support page for Windows 7 or Windows 8.
I recommend you run the windows 8 upgrade assistant before attempting to install W8.
Most likely you will not get all the hardware to work.
The link below has both the upgrade assistant software for W8.1 and W8.
http://windows.microsoft.com/en-US/windows-8/upgrade-to-windows-8