Driver for 802.11 n WLAN?

  I can't seem to find a driver for this USB Wifi adapter. At first I thought my internet was just VERY slow, but it turns out that it was my wifi card dying. I checked with another laptop that was the same laptop (hope that made sense) and I got 3.5 mpbs for download. And with the laptop that's really slow only gets .2-ish. So can you guys help me out? I plug in the thing and it's trying to search or a driver and it says it failed at doing so. 

Begin with looking for any markings on it and google those.