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Due to no cause that we can determine, the following icon overlay image has appeared on some of the icons on one of our home computers:

Anomalous image of icon overlay

Previously, a different image has appeared and disappeared; questions on other sites elicited no response.

The operating system is Windows 7; the icon overlay has now disappeared.

What is it?

Thanks.

share|improve this question
    
Hmm, not sure I got the right image. Might have to wait for them to come back. The previous overlay looked like four linked monitors. –  Narf the Mouse Oct 22 '12 at 7:06
    
Try rebuilding the icon cache next time it happens. –  Karan Oct 22 '12 at 20:38
    
Hmm, could be, thanks. This is the first reply anywhere we've gotten on the problem. Hopefully, next time it happens, I'll be able to provide during/after pictures. –  Narf the Mouse Oct 24 '12 at 5:49
    
So hopefully not happened again? –  pnuts Jan 12 '13 at 16:29

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