If you really really can't play Resident Evil 5, take a look at my notes..
1. I think all of you who had this problem should,delete the xlive.dll
2. about other .dll files,add them if missing
3. download and install Games for Windows - Live (is a microsoft program for most of the new games)
4. run the game, the Games for Windows will pop out in a while when the game is loading
5. you may create the offline profile(press Home button when you're at the create profile / existing profile)
6. enter your name, then after you'd submitted, you may be able to save game, play the game
**however, if you want to play online, you have to own the product key
---hopefully this will help you guys who can't play this resident evil 5