emachine T6412 w/Ubuntu won't upgrade to wifi. Help

Just reading what the poster seems to be using for hardware to hook up his eMachine desktop could be a part of the issue, in conjunction with his server and even the Roku device. A couple of years ago I ran into a similar situation with mixed hardware (different manufacturers) and fought the set up till I was blue in the face. The fix was matching the hardware, the router was a Dlink, the adapter a Belkin, I ran to a nearby box store and purchased a Dlink adapter and ZING the thing hooked up. The vote was out as to whether the adapter was bad or there was an issue with firmware. I hung onto the Belkin adapter and at a later time tested it with a Belkin router and it proved to be functional. Food for thought. The other thing I would suggest to someone attempting a wifi hook up with a desktop, to use such as the Roku unit, use a slot adapter, not USB, generally better functionality since USB can be flakey for that purpose.