avrdude:
no programmer has been specified on the command line or the config file Specify a programmer using the -c option and try again
On the "Tools" menu choose "Programmer:" and specify AVRISP mkII; be sure that you've also chosen the appropriate "Board:" entry for the Uno.
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yeah i know all that but it keeps showing me the same error!!! – Ahmed DemirciOglu Aug 25 '16 at 20:56
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Describe your environment: Windows? Unix, which one? Which version of the Arduino IDE? Or, are you using Eclipse or another IDE? Perhaps you need to re-install? Has it ever worked? Does, "Get Board Info" work? – DataJanitor Aug 27 '16 at 1:11
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I fixed it. I just reinstalled the drivers.
