You have Windows but you want to compile Android as well. You can, providing you install VmPlayer and a linux vm appliance. I will not get into this. I will assume you have an up-t0-date Vmware appliance up and running with reasonable virtual RAM (>1GB) and disk space (>8GB).
Credits for compiling Android in x86 go to the guys at virtuallyshocking.com
Disclaimer: you can break, erase, burn, incinerate your gear while attempting the steps outlined below. Restrain from following them if you don’t feel confident. Moreover: THIS WILL wipe whatever you have installed on your PC and THIS IS at a rather experimental stage, so don’t expect everything to function appropriately (quoting virtuallyshocking.com). Beware:The build process produces an installer, not a live image!