Installing Windows inside a virtual machine works almost identically to installing it on physical hardware — the VM software presents itself as a complete virtual PC, and Windows Setup runs against that virtual hardware exactly as it would on a real machine.
What You Need
- Virtualization software (VMware Workstation, VirtualBox, or Parallels on Mac)
- A Windows installation ISO
- A genuine Windows product key
- Enough free RAM and disk space to allocate to the VM without starving your host system
Creating the Virtual Machine
You configure the VM's specs first — RAM, CPU cores, disk size — then point it at your Windows ISO. From there, Windows Setup runs inside the VM window exactly as it would on physical hardware: language selection, product key entry, drive partitioning, and the usual out-of-box setup screens.
Licensing Requirements
A VM is a genuinely separate, complete Windows installation and requires its own valid product key — you can't reuse the same key that's already activated on your physical host PC without running into activation conflicts.
Performance Expectations
A VM shares your host machine's CPU and RAM rather than owning dedicated hardware, so it'll always run somewhat below native performance — fine for general use, office work, and light development, but noticeably behind for demanding gaming or GPU-intensive workloads.
Common Use Cases
Testing software across multiple Windows versions, running Windows on a Mac without dual-booting, isolating potentially risky software from your main system, and maintaining a snapshot you can revert to after testing changes.