The file system architecture has not changed neither did attrib
Those files you had under Windows 7 were hidden because they had the 'Hidden' AND 'System' attribute, thus therefore you were not able to see them because "Hide protected operating system files" was enabled (by default). Now to be able to hide files on your current Windows OS with "Show hidden files, folders, and drives" enabled, those files must have the attribute 'S' and "H", as well as "Hide protected operating system files" enabled.
To assign a file as a hidden system file run this:
attrib +S +H MyFile.txt