FYI this is what I was reading: "What folder are you attempting to extract to? If it's at the root of a drive, or one of the protected folders (\Program Files, ProgramData, \Windows), then yes, you need admin access to do this. If it's a profile folder (like your desktop or documents), that wouldn't make sense unless 7zip is doing something "bad" when launching (for what it's worth, I've been using WinRAR without problems on Windows 8, but I've not tried 7zip yet)." http://www.eightforums.com/software-apps/9003-7-zip-administrator-rights-problem.html After reading the quoted post, and seeing how the target directory is "C:\MinGW" per the directions, it stands to reason it would apply to 7 too, perhaps Vista as well, with it's overblown UAC. So many of our industrial UPS units and mechanical systems require the run as administrator thing, I've pretty much acclimated to doing it all the time now.