My Macbook's wireless airport signal is no longer working.
I transfered one time on my mac's windows partition.
And when I got back I can't seem to access my wifi!
How do I fix this?
What do you mean by that? the wifi logo on the taskbar says "No Airport card installed".
Take note the laptop didn't fall or anything out of the ordinary!
Your Airport card may have died. Open up your mac re-seat the Airport card and if it still doesn't work, replace it.
You can also try the smc reset here and reset the nvram here for your macbook, this may get your AP card running.