Just plug it in and it works, even without software installation (at least for me). What frustrated me was that after my Vista computer went to sleep, it didn't recognize the device as soon as I woke it up. As if the adapter wasn't plugged in at all. I had to unplug it and plug it back in before the computer saw it. Luckily I found a small button on the adapter. I pressed "On" (probably since there are no ads), and now the adapter sees the PC even after sleeping and waking up. I'm only giving this product four stars because I'm frustrated at not knowing. The instructions don't even mention it. I also installed the software, so I don't know if there were any additional benefits or problems. All I know is that the adapter now works like clockwork.
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