(40 GB is comfortable; you can use 25 GB minimal)
: Historically provided Windows cloud images for OpenStack/KVM, though availability for Windows 7 may vary as it is a legacy OS. Archive.org : You can find original MSDN ISO files windows 7 qcow2 image install download
The first step is to obtain a Windows 7 QCOW2 image. There are a few ways to do this: (40 GB is comfortable; you can use 25