Crossfire Made My Computer & my Brother's computer crash and slow.

Me and my brother downloaded Crossfire. I have Vista 32-bit and my brother has Win7 64-bit. We both downloaded it, my brother installed the game perfectly, but the setup for my computer doesn't respond. I can't install it. When my brother tried to play the game, it doesn't
work. It just nothing happened. When he uninstall it, he restarted his computer, and his computer is ALL SLOW. My computer is slow too. We know that Crossfire is the worst game for us. Ruined my computer and my brother's. Please tell us what happened. We need to know, and to for us to know that Crossfire is not fake, but now we know that is the worst game.