My newly installed win 8 system failed to connect to my home Wi-Fi without any useful information provided. I tried many times, and it always failed. Then I tried to re-configure my router to change the security type to WPA2-Personal and used AES algorithm for the encryption type. And now win 8 can connect to my home Wi-Fi like a charm.
WEP is basically non-secure, so if you encountered the same issue as mine, you can try the same approach to see if it would be the rescue.
Till next time,
-Jack
Jack Ma, a software developer 
Thanks for the information…Maybe, i am going wrong but i was believing that WEP was not supported on Windows 7 Pro