I do not think Windows would help you much.

You do not need to remove the battery. Hold the "u" key and plugin the usb-cable. Then run the flasher from the computer. Sometimes it's hard to see the usb-logo. And make sure the battery is charged. It will show a green led when it is fully charged.

Flash first the PR without the "-R" at the end. And then the Vanilla directly after with the "-R". The -R means it will restart.