No legitimate version of Resident Evil 4 exists at a 15 MB install size. The smallest legitimate repack (from trusted groups like FitGirl) is around 1.5–2 GB after extreme compression.
Here are the Resident Evil 4 System Requirements (Minimum) * CPU: Pentium III or AMD Athlon (or better) * CPU SPEED: 1 GHz. * RAM: Can You RUN It resident evil 4 pc highly compressed 15