This is a quick guide to emulate a Raspberry Pi with networking on Windows using Qemu, OpenVPN and Raspbian
qemu-system-armw -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -net nic -net tap,ifname=TAP32 -append „root=/dev/sda2 panic=1 rootfstype=ext4 rw“ -hda 2014-06-20-wheezy-raspbian.img