Hi Rodney,
I would like to inform you that desktops don’t have wireless adapters built into the system. In order for wireless to work for a computer it needs a wireless card that catches and receives any wireless signal available. Most laptops have wireless cards installed as default and you don't have to worry about wireless in that case. For desktops, you will have to connect to the router, using an Ethernet cable.
You can purchase and install the wireless adapter and its software. For this, I suggest you to contact the manufacturer to find out if there is a wireless adapter available for the desktop and how to install it.
http://www.acer.com/worldwide/support/
Please get back to us with other questions you might have, regarding Windows operating systems.