After new update my Wi-Fi won't work!!!

After I updated my macbook pro to Security update 2015-003 the wify won't work... it says: "No Hardware Installed"
can any one help me..!!! now I'm using my iPhone USB data... <-- my only way to stay online!!
my mac is MacBook Pro 13" Mid 2012, OS X Yosemite 10.10.2

Cant give an exact reason but heres the basic ts'ing for that sort of issue:
http://support.apple.com/kb/TS1398
I'd say reset network settings and restart the router, see if it still occurs. If not backup and restore.

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