I would suggest you look through the installation guide for Windows. There are a whole host of things they may want you to talk about, including disk setup for use with ASM. The user you install and run the windows services under. The user you run the scheduler under. All the considerations are in the installation manual for Windows.
You don't need to necessarily know how to do them all, but it's worth knowing what the main things are.
Possibly the answer was, don't use Windows for Oracle databases.