Right key, except Windows 7

I bought this USB drive for my laptop running Windows 7 can not be installed. Or rather, to make it work because if it is installed and recognized by the system, however, it does not detect any wireless network in range wireless ... Technical assistance has been unable to find any track. Yet I am not a computer sleeve and this is the first time in twenty years that I stumble on a problem without reaching solve it! (Like what, there is a first time for everything).
Result: I installed the key on a desktop computer running XP. Works nickel.

But beware: this key, like all key Wifi 802.11n Do NOT IMPROVED FLOW INCREASES INTERNET BUT ONLY REACH. This means that if you live in a big house, you will enjoy better coverage (or if you are in an apartment with concrete walls), but the maximum flow rate will not be changed. At home g wifi on my laptop shows a flow equivalent to that in the fixed wireless n (between 8 and 11 Mb / S approx).

So there you are warned twice.