My Macbook running 10.8.5 cannot connect to any internet. Finds no Wifi

My Macbook running 10.8.5 cannot connect to any internet. When I turn Wifi on it just searches. (yes there are several wifi signals in range) Strangely enough when i click 'Turn Wifi Off' it never turns off will just keep searching.
Never had any problems with my macbook at all, if somebody could offer some advice that would be great.
Thanks

carlfromky wrote:
Airport Extreme (latest version.)
Do you mean the new, tall ones just released?  
Try just re-selecting the drive as the destination.
If that doesn't help, try a hard reset of the Airport per Resetting an AirPort Base Station or Time Capsule FAQ (if you do have the new model, that article may not apply to it. See the Setup Guide that came with it).
If still no help, try a "full reset" of Time Machine, per #A4 in Time Machine - Troubleshooting.

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