the next4x and nest2x do not need windows drivers at this time, as the only miner at this point (the unofficial alpha zen protocol standalone miner) does not need it for the acorns plugged into them to work. when installed they will show up in device manager as "base system device" (or something like that) with an exclamation point and no driver, but will work fine with the alpha 0.11d standalone miner.

gpuhoarder mentioned when the driver is needed they will release it. i assume thats when the official squirrel miner is released.