It should have installed into C:\Program Files (x86)That's only on x64 versions of Windows. But a lot of installers allow to change the installpath during setup, so it could be a manual action, though I don't expect that.
What has happened before is that someone set compatibility mode for another installer (possibly with the same name) or on purpose, to make it believe it's running on XP? or maybe not the installer, but the final exe? These settings are system-wide AFAIK.












Thanks a LOT! Now you know what to put into the error message. Make it fool proof.
Then it'll also work for me. 