Here are the steps I would take. Plug the USB adapter in the laptop. Go to Add or Remove programs and remove any wireless assistant software.
In the Device Manager, remove the wireless USB adapter then unplug the adapter and restart the computer and try it.
Is the adapter available in network connections? If not, check the device manager, it may have to be reinstalled.
Are you able to see any available connections in WZC?
If not, make sure the adapter is not turned off with a physical switch on the laptop. Check to make sure the adapter is enabled.
Please post the results.