I just upgraded my home network with wireless N.
USB wireless adapter is dlink DWA-130C, driver
installed properly and windows 7 32bit detected it correctly as DWA-130C on device manager but it could not find any network in my area.
When I do troubleshoot, windows tell me that driver may not installed properly.
FYI it happened with my older G USB adapter too, when I uninstall the driver to update, it installed normally but then it does not detect any network. I have to do system restore to make it work again.