The minimum specifications required for Windows 7 operation were hard to find even with Google, so here are my notes.

Windows 7 System Requirements

To run Windows 7 on your PC, you’ll need the following:

1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor

1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)

16 GB (32-bit) or 20 GB (64-bit) of available hard disk space

DirectX® 9 graphics processor with Windows Display Driver Model (WDDM) 1.0 or higher driver

・Windows 7 システム要件 - Microsoft Windows

That’s all from the Gemba.