cc555 :
...I can get to the point of entering psw for other networks that are WPA-PSK
...
Win 8.0 Pro
WEP
Router is 2wire 2701 HG-B
Is there any reason not to change the wireless auth settings on the 2wire 2701 to WPA-PSK?
I haven't found anything definitive in Microsoft's online docs, but apparently (based on several sources) WEP with shared-key authentication is deprecated in Windows 8 and simply won't work.
See this post, for example. Again, I didn't find anything definitive, but apparently Windows 8 still supports WEP with open-key authentication (considered more secure than shared-key WEP). In any case, WEP is an older WiFi security standard and is widely considered broken. It may stop casual attempts to access your wireless network, but is unlikely to be a significant challenge for anyone more determined.
All that said,
this 2wire 2701 manual seems to suggest that the default WiFi security is WEP open-key. If for some reason yours is WEP shared-key, it would explain why you can't connect. In any case, I strongly recommend that you change the WiFi security settings to WPA-PSK or preferably WPA2-PSK. The manual doesn't mention WPA2, but if your router is newer or has updated firmware, it's possible that your router supports WPA2.
Hope that's helpful!