I still use Windows 7 Professional 64-bit. (My laptop originally shipped with Windows Vista.) It runs lean and mean and does everything I could even want it to do.  And no, I could give a rip about so-called security issues and Microsoft no longer supporting the operating system.  I haven't installed a Windows update since Service Pack 1 and have only ever run Microsoft Security Essentials.  My system is so clean you could eat off it.  It's always been that way.  That being said, not long ago I installed Windows 10 on a second hard drive just to play around with it, dual-boot configuration.  When installing DVD Profiler under Windows 10 I just opened the same databases I do from Windows 7.  I've gone back and forth between Windows 7 and Windows 10 many times now.  No issues.  It's pretty awesome to be able to work with my DVD Profiler databases from either version of Windows.  Just thought I'd throw that out there.  It works beautifully.