When I restart the system the wifi works for the first time and later after a while it will be disabled and It doesn't work even though when you turn it on from the system preferenced. I tried removing key chain passwords and restarting system, it works for a while and then it goes disabled. I have re- installed the OS X lion but still not working. Can some one please tell me any solution for it. I have been trying for past 2 days but no solution has been worked out for me..
Pro, Mac OS X (10.7.5), 2.4ghz 4gb ram and 250gb hard drive