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Strange yellow box on desktop

Hello

I noticed the other day that a small yellow box as appeared behind the apple symbol in the top left of the screen on desktop.

When i click on it it just opens the 'about this mac' options.

I have ran a virus scan and it says its all clear

does anyone know what it is and how I get off my screen. I have attached an image of to help. It also appears when the computer is locked (password) screen but appears to have a 'M' in it and a small pointer (mouse cursor)

User uploaded file

Cheers

MacBook Pro, OS X Mavericks (10.9.1)

Posted on Jan 14, 2014 3:57 PM

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Jan 15, 2014 5:38 AM in response to bazmonkey

MacKeeper is scareware, marketed extremely aggressively by an unethical company. It has been known to damage systems to the point that they have to be reinstalled. You need to remove it right away.


iAntivirus won't hurt you, but it won't do much to help you either. It's not very good at detecting Mac malware.


Regarding the yellow box, that's not a symptom of any known malware. It's very unlikely that it would be a malware issue anyway.


It's hard to say what it is, though. Start by testing in safe mode... does the box still show up when you are in safe mode? If so, it's most likely something wrong with your system or a hardware issue. If not, and if it shows back up when you reboot normally, then it's caused by some third-party software you have installed.

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Strange yellow box on desktop

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