I recently purchased one of these tiny EDUP wireless adapters on EBay. First of all they advertise them as 'high power' but they are really not 'high power' if you were expecting 500 MW or 1000 MW like the real high power USB adapters can put out. If you really want high power add 500, 1000, or even 2000 MW to your search in EBay. On the other hand the external antenna may double your range compared to the antenna that is built into most laptops.
Anyway I lost the driver disk and could not find it. I Googled it but no one seemed to know where to find the driver! When you plug it in the computer says something about a RTL 8188 driver and that is the secret. Just go to www.Realtek.com and search for the 8188SU driver.
Here is a link but you may have to cut and paste it into your browser: