I can't begin to guess why, but when I got my MacBook back from the "Geniuses" I found that the entire root of my HD - Apps, Library, System, Users, and the alias to "User Guides And Information" - had been copied, apparently by drag & drop, to my 2nd partition (which does not have OS X installed on it).

I deleted everything, but one item, System/Library/Caches/com.apple.bootstamps/10C977F3-9B60-34F6-89DB-62AEBBA096FA/(Empty), reappears every time I start up, or restart.

Any body got a clue what it's all about?

Thanks.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire