First I would like to say I have been a lurker to these forums for a long time now and I just decided to join because you guys seem to know what your talking about. My question is... what is going on with my imac! I've had it for a while now and all of a sudden this happens: 

some of them flicker too. I hope its not a virus...


some of them flicker too. I hope its not a virus...
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