Google said it routinely flags any search results with that message if the site is known to install malicious software in the background or otherwise surreptitiously, a practice aimed at protecting its users.
It gets its list of suspicious sites from StopBadware.org, a nonprofit project headed by legal scholars at Harvard and Oxford universities who research consumer complaints.
The Google error only lasted about one hour.
I wonder if this had anything to do with why the Google Adsense “gadgets” on my desktop stopped working.
Link
Google said it routinely flags any search results with that message if the site is known to install malicious software in the background or otherwise surreptitiously, a practice aimed at protecting its users. 
A picture of my cave

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