Just thought I would post this to give a heads up to anyone having problems installing, it seem's that quite a few of the retail discs won't install. Copy all the files to your hard drive and run setup from there, making sure you remove any broken installations first, otherwise you won't get the choice to activate online or via CD
Mine's steam-bought, not retail, but I can't bring myself to create yet another Bad Company 2 thread. Unable to launch game because I'm behind a proxy. Whee!