Like I mentioned before, you need to take a look at your routers wireless setting then designate those settings when you set up the wireless connection for this adaptor. The SSID the type of encryption "preferribly WPA2 with AES encryption, and the type of 802.11 frequency choose "G" for this adaptor.
It also is supposed to install better if you go into the device manager and update the driver
from there or try letting Windows 7 install it's own drivers
after delating the Netgear ones. Updating your router is another option you might want to pursue. Also get rid of that Netgear software as it mostly seems to cause problems.