Thanks guys - no, I'm definitely talking about Windows 7 Search.
I was searching the Calibre folder because I knew it had some PDFs containing the phrase 'debt buy back'. I found the pdfs I was looking for by doing a search on the e: drive.
I get the Search... item on all folders, 1st attachment shows it on c:\Program Files
Its quite possible that I installed a 3rd party widget to provide Search... on folders. I drive everything from the 'right click' menu key, so if I saw such a thing I would have grabbed it immediately. I've had windows 7 since the last beta and I sometimes forget what's native and what I've added.
And I've been doing some 'tidying up' recently so its conceivable I tidied it away permanently
Which begs the question - do you guys know of anything that will add Search... to folders.
I've attached a shot of the shell extensions I have on folders - the ones I've marked I cant readily explain - perhaps someone else can ?