Wifi turn off itself randomly

Hello everybody
I have a problem with my Macbook Pro
This is my Information:
Macbook Pro Mid 2010 MC374
16gb RAM
WD Blue 500gb
OS X 10.9.1
My wifi randomly turn off itself. The wifi icon on menu bar still having full signal, when i go to System Preference -> Network, Wifi show OFF. Try to Press Turn on Wifi nothing happen. After press, the wifi icon on menu bar have no signal (Turn off icon)
The only way to turn on the wifi again is restart the machine
I try a lot of method:
Reset NVRAM
Reset SMC
Install clean OS
Downgrade to 10.8
It help for some days, affter that, it happen again
Any one have the same problem?
Can any one fix it?
It don't like "No Wifi installed" problem
Sorrry about my English because I'm from Vietnam
Thank you

Do you have stamina mode turned on? you also may want to consider a software repair as you may have an app causing this issue
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. Richard P. Feynman

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Hi,
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http://social.technet.microsoft.com/Forums/windows/en-US/11d2cc27-cee8-41e1-865a-f5f7098e1d26/windows-8-wifi-off-problem?forum=w8itpronetworking
For further troubleshooting plan, please upload the event log here for further research.
Kate Li
TechNet Community Support

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Ok... it is getting a bit clearer but there are still some questions.
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I was assuming airport in this statement in your first post meant the TC or the Express.. but I now realise we are still in the mass confusion stage where apple calls everything wireless an airport. So what you mean is the airport internal card of the computer??
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If the computer is close it will be faster than the FIOS.
You can run both wireless networks with different names.. so it is clear which is which. But you can also setup roaming so the computers themselves pick which is the best wireless.
I tried extending the wireless net work and tried joining wireless network, but the TC kept crashing and I had to keep resetting the TC. the Apple support person said these, extend wireless network and joint wireless network, are no longer a connection option with the new TC because of the new AC protocol.
Thanks again!
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If you want to attach a screenshot to a response here, click the "camera" icon above the text field:
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