Why are my icons flashing off and on?

My I icons flash off and come back is about a second. This repeats about every minute as if it is stuck in a loop.

Well, I too had a case of the "flashing icons" beginning a week after downloading Maverick.  Flashed about every 1-2 minutes.  I asked Mac support about this through a "chat" and received about 2 pages of tutorial info from them that was so loaded with "geek speak" and tech terms, I was about to throw myself over the railing of my 2 story apartment.  At 63, there was no way I could follow this "stuff" without probably destroying my MAC and tearing out what little hair I have left.   
None of it mentioned playing with Google by the way.  
One option was simple however:  Re-download Maverick and see if that does it.  Frankly, I like the practical ideas. So I went back to the App Store and re-downloaded Maverick last night, and all is fine.  No sluggishness, not that I had any to begin with, no loss of data, no nothin'!  Just smooth sailing.  Give it a try.....there's nothing to lose. 

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