1- First, download and install the Nintendo DS emulator for Windows PC. 2- Now download the Pokemon Black 2 ROM from www.pokemonxenoverse.com . 3-Open the emulator on your PC and use the emulator to locate the ROM file. 4-Now click the "Play" button to start the game. Adjust the picture settings as needed. 5- Start playing the game for free on your Windows PC. No further settings are required.