|The only thing I can think of with regard to the computer not even connecting to the wireless network is that there is a problem with the wireless network interface.|
I would suggest you check for updated drivers for your NIC (network interface) and if there are some available, download them and update your NIC.
If there aren't, the only other thing I can think of trying would be to uninstall the TCP/IP stack and reinstall it.
If neither of those fix your issue, you might want take it in to a reputable shop and have them look at it as it may be a hardware issue (ie: the NIC might be broken).
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.