Hi. My wife's Windows 10 system failed miserably and, after trying all the gentle approaches, like System Restore - I could only get the Blue Screen of Resolutions - I ended up doing Rebuild the System, saving all personally created files. This is a wonderful thing that Microsoft shoulda done many years ago, giving us a way to recover our systems without having to reformat, or wipe out and start fresh, and all the stuff I learned back in the 80s and 90s; but ... and there always is a but ... I chose to restore Windows while leaving personally created documents, etc., alone, safe and secure. I'd done that before on my own machine, a much newer one running the prerelease Insider Preview stuff, and had no problems at all. So all seemed to be well; I then reinstalled Office Pro 2010. But when I tried to bring in her old Outlook files, I was unable to find them, so to speak. I did, however, find an *.OST file in \Windows.old under \Users. It was the right name for her file, but the wrong extension, as Outlook doesn't seem to like OST files. I am getting too old to remember all the neat tricks we used way back when, and was hoping that someone here could help me. If it's a simple import of a sort ... or something else sorta easy, I will feel properly foolish and embarrassed, but I need to get her files back. We've bought her a new PC and I want to fix this problem before migrating necessary things to the new PC. Can you offer some advice on how to do this? Thank you very much, everybody. Cheers, -a.