Cheers Rick
It was pulled out of a machine that would no longer boot up windows 7. Despite my best efforts with recovery disks, repair options etc I couldn't get the bugger to start windows. I assumed part of the HD had become corrupted.
If I connect this extracted HDD via the USB Sata enclosure thingy, I can open the drive and look but the contents appears to be just a "recovery" file of unknown extension and a few tiny XML docs. If I got disk properties it's showing 8 gig of files with 7gig free.
Someone recommended "GetDataBack" so might try that.
Edit - tried that GetDataBack, it's absolutely brilliant! Problem solved, got all the required data from the drive.