I started to use Windows 7 from last year until recently when I moved to Windows 8.1 because of Windows 7 EOS and dropping program support. I am a small kid lol, so I don't do very much with my computer, except for writing documents, drawing on paint and now, attending online classes. Windows 7 was wonderful for me when I used it and I loved it, while I hated Windows 10. My specs:
Dell Inspiron 15 3559
Intel Core i3 6006u
4 GB RAM
1 TB HDD
This computer was verrrrrrry slow with Windows 10, but superfast with Windows 7. 8.1 is faster still.