no telling without knowing where the pictures were actually stored. Home page consists of links. You may have broken then links with your clean up. When you say yahoo home page, exactly where? be specific.
I cleaned up my computer today using malwarebytes, spybot, ccleaner, and cleanup. Now all I have on yahoo home page is little tiny squares with bent over corners. I know it is something as simple as a setting probably. Any body got an answer for me???

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