What you can do (and I have done it with much success) is use a lightweight Linux installation as a base for QEMU which is a Virtualbox alternative, with much more configuration options, including the ability to emulate the Apple SMC and its 'OSK' string (you won't need shady 'hackintosh' kexts) and it has reliable USB pass through (I successfully restored iOS devices and installed apps on them). Virtualbox on Windows is definitely not suitable for this, as Windows itself is quite resource-hungry, Virtualbox lacks many configuration options and even if you can get it to work it's going to be quite unreliable, not to mention that you can't pass through USB devices.
