>>>Is there any browser related mouse click that could run the Windows search engine? While surfing a Web page, just by using the mouse, at two occasions, this has happened. The only other application running was Windows Explorer. I was wondering what could have triggered that application to start.
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>>Windows key + E to trigger WE.
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>>I also found http://windows.microsoft.com/en-us/windows-vista/Keyboard-shortcuts
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>>which doesn't list Search functionality.
>
>What about Windows key + F?

It does seem to bring search dialog, but it's completely different in Win 7 than it was in XP.