do the following please:
Click Start, Run and in the box enter:
msinfo32
Click OK, and when the System Summary info appears, click Edit, Select All (Ctrl-A), Copy (Ctrl-C) and then paste (Ctrl-V) the information back here in your next reply.
You can edit out any personal information.
also expand the components/network/adapter and paste that info also.
answer the following please:
are you using any utility other than windows to search for wifi connections?
if using windows you have to have the Wireless zero configuration service set to automatic
http://support.microsoft.com/kb/968682
above is microsoft page with fix it to do this automatically.
also try to install the registry key in safe mode
and also in registry ensure you right click on key and give yourself permission
post back with info