|First: thank you for your help.|
Second: What occur sis that the Acer cannot find my network. When I point it to the network using the Win7 Network Sharing center, it establishes a connection which perists for a while but inevitably drops. No other device has this problem. I moved the Acer a few feet from the Cisco Wifi box as a test. No improvement.
Third: Does the adapter appear in the list when viewing Device Manager? If so, is there a punctuation marks next to it? Yes it appears on the list along with the MSFT virtual WiFi Miniport Adapter. If by "punctuation mark: you mean "!", then yes next to the SFT virtual WiFi Miniport Adapter. I reloaded the original driver from the Acer driver disk. It changed nothing. I will try your link