I downloaded Bioshock 2 last week, and I started playing today. (I know, a bit late to start with it, but what the hell :P) So after I played for a couple of hours, I tried to save. I couldn't. The problem apparently is that I don't have a Windows Live account. So I created one and tried again. When I started the game, I had to put in a serial (which I don't have) to continue.
Any ideas on how to circumvent this security detail? Or how I can save without a serial (short from buying the game)?