Back to 10.8.4 from mavericks 10.9.3/ WIFI Issues

I was originally operating on Lion 10.8.4
Apple Compressor stopped letting me submit files for compression, the button was grayed out. After some research it seemed the most likely cause was that Apple Qmaster, Compressor and Quicktime may be operating on diiferent versions, causing the problem. The advice was to update the software to ensure they were all operating off the same version.
I went to update the whole system and a kernal panic occured. After updating to 10.8.5 the wifi stopped working. Sometimes it worked for a few minutes upon turning the computer on, but soon drops. I tried resetting the PRAM.
Upon advice I updated to Mavericks. The problem remains.
I am using a 13 inch Macbook Pro/ Mid 2012.
Any advice welcome!

Troubleshooting Wi-Fi issues in OS X
Wireless Connection Problems - Fix
Wireless Connection Problems - Fix (2)
Wireless Connection Problems - Fix (3)
Wireless Connection Problems - Fix (4)
Wireless Diagnostics - About
Also try turning off Bluetooth

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Back to 10.8.4 from mavericks 10.9.3/ WIFI Issues

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