Welcome to Apple Support Communities.
We are users here, not 'Apple Inc.'
So you get help here by patiently waiting for someone to post an answer.
And by trying not to intentionally antagonize those who might be able to assist.
If you believe that "Apple User Names are stupid", then why on earth would you even bother to post your question here?
Why not just use a popular search engine to find an answer to your question from one of the other support sites available?
It's an old issue.
Here's an existing similar discussion thread that browsing/search could have found:
https://discussions.apple.com/thread/2465950?start=0&tstart=0
One user in the thread apparently solved the problem by (eventually) receiving a replacement wireless "card":
Another user in the thread suggested using , System Preferences, Internet & Wireless, Network, Assist me, Assistant to create a new location and enter the password.
A temporary solution suggested in the thread would be to turn off the router security, or try WEP or WPA instead of WPA2-PSK(AES).
Not all WiFi router brands and models have the problem. My D-link DIR-655 (an older Draft-n model) has always worked flawlessly with multiple Apple WiFi devices, game systems, and Windows computers.